Angles
Recognise and measure angles, and use angle facts in triangles, on lines and around points.
What your child learns
- Acute < 90° < obtuse < 180° < reflex
- Angles on a straight line add to 180°; around a point 360°
- Angles in a triangle add to 180°
Example
A triangle has angles 50° and 60°, so the third is 180 − 110 = 70°.
Practice questions
A taste of the questions in BloomTracks – the app makes fresh ones every time and adjusts the level as your child answers.
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Question 1 · Level 1
What kind of angle is this?
- obtuse
- acute
- right
Show the answer
Answer: obtuse
This angle is about 135°. An obtuse angle is between 90° and 180°.
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Question 2 · Level 3
About how big is this angle?
- 90°
- 135°
- 180°
- 45°
Show the answer
Answer: 135°
The angle is about 135° – it is an obtuse angle.
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Question 3 · Level 5
An isosceles triangle has a top angle of 64°. The other two angles are equal. What is each of them?
Show the answer
Answer: 58
116 ÷ 2 = 58°.
Try it at home
Open a door or book to make acute, right and obtuse angles.
Key takeaway
Compare any angle to a right angle (a square corner) first.
Practise angles with Bloomie
Bloomie reads every question aloud, listens to spoken answers and adapts the difficulty one question at a time.