| Question | Answer |
| a = a Angles joined by the same arc are equal | |
| c = 90° A triangle inside a semi circle is right angled | |
| a = 2b The angle at the centre is double the angle at the circumference | |
| a = c b = d Opposite angles in a cyclic quadrilateral add up to 180° | |
| y + 130 = 180 x= 2y | |
| s = 90° t = 90° S and t are right angles | |
| Two angles in an isosceles triangle are the same | |
| Opposite angles are the same | |
| e = 81 + 73 e = 180 - 154 Angles on a straight line add up to 180 |
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