Question

Trinagles ABC and DEF are similar.
(i) If area $\left(\Delta ABC\right)=16c{m}^2,area\left(\Delta DEF\right)=25c{m}^2$ and BC = 2.3 cm find EF.
(ii) If area $\left(\Delta ABC\right)=9c{m}^2,area\left(\Delta DEF\right)=64c{m}^2$ and DE=5.1 cm, find AB.
(iii) If AC = 19 cm adn DF = 8 cm, find the ratio of the area of two triangles.
(iv) If area $\left(\Delta ABC\right)=36c{m}^2$, are $\left(\Delta DEF\right)=64c{m}^2$ and DE= 6.2 cm, find AB.
(v) If AB = 1.2 cm and DE=1.4 cm, find the ratio of the areas of $\Delta ABC$ and $\Delta DEF$.

Answer 1

we know that the ratio of the areas of two similar triangles is equal to the ratio of their corresponding sides.