Calculate the-area of the green colored part of this picture:

Calculate the area of the triangle shown below.

Calculate the perimeter and area of the triangle in the picture.

In the figure, the diagonals of a quadrilateral split it into four triangles. The areas of three of them are shown in the picture: Calculate the area of the whole quadrilateral.

In the picture, the square on the hypotenuse of the top most right triangle Is drawn. Calculate the area and the length of a side of the square. .

Calculate.the perimeter and area of the triangle in the picture.

The picture below shows two circles, each passing through the center of the other. Calculate the area of the region common to both.

Calculate the area and perimeter of a triangle of sides 30 centimetre, 28 centimetre and 30 centimetre. Also calculate the radius of the incircle.

In the picture below, ACB is a semicircle. Find the area of the shaded portion of the figure.

In the picture below, two lines are drawn from the top vertex of a triangle to the bottom side: Prove that the ratio in which these lines divide the length of the bottom side is equal to the ratio of the area of the three smaller triangles in the picture.