Angles in a triangle add up to 180° and in quadrilaterals add up to 360°. Angles can be calculated inside semicircles and circles. Parallel lines in shapes can form corresponding and alternate angles.

In this diagram what is the value of ?

In this diagram two lines are marked as being parallel. What is the value of c?

In this diagram two lines are marked as being parallel. What is the value of d?

In this diagram what is the value of e?

In this diagram what is the value of f?

This triangle is isosceles. What is the value of g?

This triangle is isosceles. What is the value of h?

For this rectangle what is the value of i?

For this kite what is the value of k?

In the diagram PQ is a diameter of the circle.What is the value of ?

In the diagram AB is a diameter of the circle.What is the size of angle ABC?

In the diagram PT is a tangent and CT is a radius of the circle.What is the value of y?

In the diagram KL is a tangent and MK is a diameter of the circle.What is the size of angle MLK?

In the diagram EG is a diameter of the circle.What is the length of EG? (Give your answer correct to one decimal place).

4.4cm

4.5cm

7.2cm