The bottom side of the quadrilateral in the picture is a diameter of the circle and the top side is ạ chord parallel to it. Calculate the area of the quadrilateral.

Calculate the length of sides of quadrilateral. .

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.

Suppose wedraw a circlewith the bottom side of the triangles in the picture as diameter. Find out whether the top corner of each triangle is inside the circle, on the circle or outside the circle.

The pictures below show circles through the vertices of a square and a rectangle.Calculate the areas of the circles

In the semicircle shown, the top chord Is parallel to the diameter. What is its length?

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.

Suppose that each side of the square in the picture has length 12 cm . What is the area of the shaded part?

In the figure, the radius of the semicircle with centre O is 5 centimetres. PB=2 centimetres. Calculate the area of the square with PM as one side. .

The sides PQ, RS of the quadrilateral shown below are parallel. Compute all inner and outer angles of the quadrilateral.

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