Learn how to identify and calculate angles around a point with this Year 5 Maths guide from BBC Bitesize. ... To calculate the missing angle b, you need to know the value of the other two angles.

Learn how to find the angles in right-angled triangles with this BBC Bitesize Maths article. ... The aim is to find the value of Ɵ that makes cosƟ equal 16/32.