Checking and securing understanding of basic angle facts | Maths

Starter quiz

A __________ is the region formed between two radii and their connecting arc.

circle

circumference

diameter

sector ✓
What is the size of the angle marked $x$ ?

67°

73°

113° ✓

127°
What is the size of the angle marked $x$ ?

67° ✓

73°

113°

127°
The size of the angle marked $x$ is ______°.

'240' ✓
Match each angle to its size.

∠BCD

⇔

113° ✓

∠CDA

⇔

92° ✓

∠ABC

⇔

90° ✓

∠DAB

⇔

65° ✓
The three letter notation for the marked angle is ∠______.

'FMA' ✓

Angles around a point sum to ______°.

'360' ✓
Angles that meet at a point on a straight line sum to ______°.

'180' ✓
Vertically opposite angles are __________.

conjugate

equal ✓

supplementary
The size of ∠BEA is 70°. Therefore the size of the obtuse angle ∠CEB is ______°.

'110' ✓
The size of ∠BEA is 70°. Therefore the size of the acute angle ∠DEC is ______°.

'70' ✓
The size of ∠BEA is 70°. Therefore the size of the reflex angle ∠AEB is ______°.

'290' ✓

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Angles on a straight line sum to 180°

Angles that meet about a single point on a straight line sum to 180°. If the angles are not adjacent, then they may not necessarily sum to 180°.

Angle - An angle is a measure of turn. It is often displayed as the rotation between two line segments.
Sector - A sector is the region formed between two radii and their connecting arc.