Securing understanding of angles from KS2 | Maths | Quizalize & Oak National Academy

Starter quiz

Complete the sentence: The two angles of 44° and 136° are ____________ with each other.
- right angled
- complementary
- supplementary ✓
- conjugate
- opposite
The size of angle $a$ is measured accurately. Which of these statements could be accurate for angle $a$ ?
- angle $a$ is acute
- angle $a$ is obtuse ✓
- angle $a$ is reflex
- angle $a$ is 36°
- angle $a$ is 144° ✓
Match the angle name to its size.
- acute
  
  ⇔
  
  11.7° ✓
- right angle
  
  ⇔
  
  90° ✓
- obtuse
  
  ⇔
  
  117° ✓
- reflex
  
  ⇔
  
  217° ✓
- one full turn
  
  ⇔
  
  360° ✓
Match the pairs of angles to their description.
- 30° and 60°
  
  ⇔
  
  lie on a right angle ✓
- 45° and 135°
  
  ⇔
  
  supplementary angles ✓
- 120° and 240°
  
  ⇔
  
  conjugate angles ✓
- 120° and 140°
  
  ⇔
  
  two random angles ✓
Which of these statements about this diagram are accurate?
- Angles $b$ ° and 172° are supplementary angles.
- Angles $b$ ° and 172° are conjugate angles. ✓
- $b$ = 188. ✓
- $b$ is a minor angle.
- $b$ is a major angle. ✓
QR is a line segment. Find the value of $c+d+g+h$ .
- '260' ✓

TU is a line segment. Angle $a$ ° = ______°.
- '40' ✓
These three angles lie around a point on a full turn. Angle $b$ ° is ______°.
- '100' ✓
This diagram shows four angles around two line segments that meet at an intersection. Which of these statements are correct for angle $c$ °?
- Angle $c$ ° and 59° are supplementary. ✓
- Angle $c$ ° and 59° are vertically opposite.
- Angle $c$ ° is 59°.
- Angle $c$ ° is 121°. ✓
- Angle $c$ °is 301°.
This diagram shows four angles around two line segments that meet at an intersection. Which of these statements are correct for angle $d$ ?
- Angle $d$ ° and 59° are supplementary.
- Angle $d$ ° and 59° are vertically opposite. ✓
- Angle $d$ ° is 59°. ✓
- Angle $d$ ° is 121°.
- Angle $d$ ° is 301°.
PQ and RS are straight line segments. Angle $e$ ° = ______°.
- '78' ✓
PQ and RS are straight line segments. Match each angle to its size.
- $f$ °
  
  ⇔
  
  128° ✓
- $g$ °
  
  ⇔
  
  52° ✓
- $h$ °
  
  ⇔
  
  38° ✓
- right angle
  
  ⇔
  
  90° ✓
- not an angle on the diagram
  
  ⇔
  
  32° ✓

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Angles on a straight line sum to 180°

Angles on a straight line only sum to 180° if all of those angles share a common vertex. Show two angles "on a line" at different points.

Vertical angles - Vertical angles are pairs of opposite angles formed when two lines intersect at a point. They are equal.
Vertex - A vertex is the point where two or more line segments meet. The plural is vertices.
Similar - Two shapes are similar if the only difference between them is their size. Their side lengths are in the same proportions.
Supplementary angles - Supplementary angles are a pair of angles that sum to 180°.
Conjugate angles - Conjugate angles are a pair of angles that sum to 360°.