In ΔABC and ΔDEF, we have 
, then ar (ΔABC): ar (ΔDEF) = ?
Therefore Δ ABC
Δ DEF
If two triangles are similar, the ratio of the area of triangle is equal to the square of the ratio of the sides.
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In ΔABC and ΔDEF, we have , then ar (ΔABC): ar (ΔDEF) = ?
Therefore Δ ABCΔ DEF
If two triangles are similar, the ratio of the area of triangle is equal to the square of the ratio of the sides.