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How to find if two acute / obtuse triangles are similar Practice Test
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Q1
$\bigtriangleup ABC \sim \bigtriangleup DEF$; 
; 
; $\bigtriangleup DEF$ has perimeter 90.
Give the perimeter of $\bigtriangleup ABC$.
$\bigtriangleup ABC \sim \bigtriangleup DEF$;
Give the perimeter of $\bigtriangleup ABC$.
.