Triangle A has a base of x and a height of 2x. Triangle B is similar to triangle A, and has a base of 2x. What is the ratio of the area of triangle A to triangle B ?

If x=3, what is the area of the triangle above?

What is the area of equilateral triangle if the base BC = 6 ?

If the altitude of two similar triangles are in the ratio 2:3 , what is the ratio of their areas?

In the triangle above, sin x=0.8 and cos x=0.6. What is the area of the triangle?

Base of a triangle is 9 and height is 5 . Base of another triangle is 10 and height is 6 . Find the ratio of areas of these triangles.

In two similar triangles A B C and P Q R , if their corresponding altitudes A D and P S are in the ratio 4:9, find the ratio of the areas of triangle A B C and triangle P Q R .

ABC is an isosceles triangle right-angled at B. Similar triangles ACD and ABE are constructed on side AC and AB. Find the ratio between the areas of triangle ABE and triangle ACD.

The base and the heigth of a triangle are in the ratio 5 : 3 and its are is 43.2m^(2) . Find the base and the height of the triangle .

Triangle ABC (see figure) has a base of 2y, a height of y, and an area of 49. What is y?

A triangle with integral sides has perimeter 8 cm. Then find the area of the triangle