Perimeter - Pre-Algebra
Card 1 of 344
An equilateral triangle measures three inches along its three equal sides. What is the perimeter of the triangle?
An equilateral triangle measures three inches along its three equal sides. What is the perimeter of the triangle?
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To find the perimeter of any object, simply add the length of each side together.
The best answer is:
nine inches
To find the perimeter of any object, simply add the length of each side together.
The best answer is:
nine inches
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What is the perimeter of an equilateral triangle with a side of 
?
What is the perimeter of an equilateral triangle with a side of
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Write the formula to find the perimeter of an equilateral triangle. All three sides are equal.
Substitute the side length.
Write the formula to find the perimeter of an equilateral triangle. All three sides are equal.
Substitute the side length.
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What is the perimeter of an isosceles triangle with a base length of 
?
What is the perimeter of an isosceles triangle with a base length of
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For an isosceles triangle, two of the side legs are equal. It is necessary to know two of the three sides in order to sum the lengths. The problem only gave us the length of the base.
There is not enough information to solve this question since the length of the other leg is unknown.
For an isosceles triangle, two of the side legs are equal. It is necessary to know two of the three sides in order to sum the lengths. The problem only gave us the length of the base.
There is not enough information to solve this question since the length of the other leg is unknown.
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Find the perimeter of an isosceles triangle with a base of 4 inches and side length of 10 inches.
Find the perimeter of an isosceles triangle with a base of 4 inches and side length of 10 inches.
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An isosceles triangle has two sides that have the same length. If the base is 4 and one of the sides is 10, then the other side is also 10.
An isosceles triangle has two sides that have the same length. If the base is 4 and one of the sides is 10, then the other side is also 10.
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An isosceles triangle measures 
inches along its two equal sides, and 
inches along its third side. What is the perimeter of the triangle?
An isosceles triangle measures
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To find the perimeter of any object, simply add the length of each side together. This triangle has sides of 4, 4, and 7, so the answer is:
inches
To find the perimeter of any object, simply add the length of each side together. This triangle has sides of 4, 4, and 7, so the answer is:
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An equilateral triangle measures 
inches along its side. What is the area of the triangle?
An equilateral triangle measures
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To find the perimeter of any object, simply add the length of each side together. The best answer is:
square inches
To find the perimeter of any object, simply add the length of each side together. The best answer is:
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An isosceles triangle measures 
inches along its two equal sides, and 
inches along its third side. What is the area of the triangle?
An isosceles triangle measures
Tap to reveal answer
To find the perimeter of any object, simply add the length of each side together. The best answer is:
inches
To find the perimeter of any object, simply add the length of each side together. The best answer is:
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An equilateral triangle measures 
inches along its three equal sides. What is the area of the triangle?
An equilateral triangle measures
Tap to reveal answer
To find the perimeter of any object, simply add the length of each side together. The best answer is:
inches
To find the perimeter of any object, simply add the length of each side together. The best answer is:
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Find the perimeter of an equilateral triangle with a side of length 14 inches.
Find the perimeter of an equilateral triangle with a side of length 14 inches.
Tap to reveal answer
The formula for the perimeter of a triangle is
where a, b, and c are the lengths of each side.
We know that an equillateral triangle has 3 equal sides. Therefore,
Therefore, the perimeter of an equillateral triangle with a side of length 14 inches is 42 inches.
The formula for the perimeter of a triangle is
where a, b, and c are the lengths of each side.
We know that an equillateral triangle has 3 equal sides. Therefore,
Therefore, the perimeter of an equillateral triangle with a side of length 14 inches is 42 inches.
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A man is planting a flower bed in the shape of a triangle. It measures three feet along one edge, four feet along another, and five feet along its final edge. What is the perimeter of the triangle?
A man is planting a flower bed in the shape of a triangle. It measures three feet along one edge, four feet along another, and five feet along its final edge. What is the perimeter of the triangle?
Tap to reveal answer
To find the perimeter of any object, simply add the length of each side together. The best answer is:
square feet
To find the perimeter of any object, simply add the length of each side together. The best answer is:
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An isosceles triangle measures eight inches along its two equal sides, and ten inches along its third side. What is the area of the triangle?
An isosceles triangle measures eight inches along its two equal sides, and ten inches along its third side. What is the area of the triangle?
Tap to reveal answer
To find the perimeter of any object, simply add the length of each side together. The best answer is:
square inches
To find the perimeter of any object, simply add the length of each side together. The best answer is:
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An isosceles triangle measures 
inches along its two equal sides, and 
inches along its third side. What is the area of the triangle?
An isosceles triangle measures
Tap to reveal answer
To find the perimeter of any object, simply add the length of each side together. The best answer is:
inches
To find the perimeter of any object, simply add the length of each side together. The best answer is:
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What is the circumference of a circle with a radius equal to 
?
What is the circumference of a circle with a radius equal to
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The circumference can be solved using the following equation:
The circumference can be solved using the following equation:
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The perimeter of a given rectangle is equal to the circumference of a given circle. The circle has radius 
inches; the width of the rectangle is 
inches. What is the length of the rectangle?
The perimeter of a given rectangle is equal to the circumference of a given circle. The circle has radius
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The circumference of a circle with radius 
inches is
inches.
The perimeter of the rectangle is therefore 
inches. To find its length, substitute 
and 
into the equation and solve for 
:
inches
The circumference of a circle with radius
The perimeter of the rectangle is therefore
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What is the circumference of a circle with an area equal to 
?
What is the circumference of a circle with an area equal to
Tap to reveal answer
Using the area, solve for the radius:
Divide by 
:
Take the square root:
Plug this radius into the formula for the circumference:
Using the area, solve for the radius:
Divide by
Take the square root:
Plug this radius into the formula for the circumference:
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Becky's house is surrounded by a circular lake that Becky runs around each day. If Becky wants to figure out the distance she runs around the lake, what formula should Becky use?
Becky's house is surrounded by a circular lake that Becky runs around each day. If Becky wants to figure out the distance she runs around the lake, what formula should Becky use?
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Becky should use the circumfrence formula to find the distance she runs of a lake.
Correct Answer: 
Becky should use the circumfrence formula to find the distance she runs of a lake.
Correct Answer:
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What is the circumference of a circle with a radius of 
?
What is the circumference of a circle with a radius of
Tap to reveal answer
The circumference can be solved using the following equation:
Where 
represents the radius. Therefore, when we substitute our radius in we get:
The circumference can be solved using the following equation:
Where
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Determine the circumference of the circle if the radius is 20.
Determine the circumference of the circle if the radius is 20.
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Write the formula for circumference.
Substitute the radius and solve.
Write the formula for circumference.
Substitute the radius and solve.
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Given the area of the circle is 
, what is the circumference of the circle?
Given the area of the circle is
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Write the formula for the area of a circle.
Substitute the area.
Write the circumference of the circle.
Substitute the radius.
Write the formula for the area of a circle.
Substitute the area.
Write the circumference of the circle.
Substitute the radius.
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Find the circumference of the circle with a diameter of 
.
Find the circumference of the circle with a diameter of
Tap to reveal answer
Write the formula for the circumference of a circle.
Substitute the diameter.
Write the formula for the circumference of a circle.
Substitute the diameter.
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