Question

The dimenson of Triangle B are 3 times the dimensions of Triangle A the area of trinagke B is 72cm2........What is area of triangle A

Answer 1

\[(l _{1}/l _{2})^{2} = Area _{1} / Area _{2}\]You can take any length to be length one but you must take its area as area one. I hope this helps.

Answer 2

If two polygons are similar, then the square of the scale factor is the ratio of the areas of the two triangles.

(1/3)^2 = A/72 where A is the area of the smaller triangle
1/9 = A/72
9A = 72
A = 8 square cm

Answer 3

Thank you so much