Question

The ratio of corresponding sides of similar triangles is 3 : 5; then Find the ratio of their areas.

Answer 1

According to theorem of areas of similar triangles "When two triangles are similar, the ratio of areas of those triangles is equal to the ratio of the squares of their corresponding sides".
Therefore, the ratio of the areas of triangles $=\frac{3^2}{5^2}$
$=\frac{9}{25}$