Grade 4 · Maths · Lessons
A turn, cut into 360
🔄full turn📐angle🌀360↩️quarter
Turns.The big ideaA full turn is 360 degrees. One tiny turn is one degree.
How it works
A full turn is 360 degrees. One tiny turn is one degree.
A quarter turn is 90 degrees. A half turn is 180 degrees. A three-quarter turn is 270 degrees.
Turns add up: 60 degrees and 150 degrees more makes 210 degrees.
Example 1: Name the turn
- An angle is 270 degrees. Which turn is it?
- 270 is three of the 90s: 90 + 90 + 90 = 270.
- Three quarters of a full turn.
- So the answer is a three-quarter turn.
Example 2: Join turns
- Max turns 60 one-degree angles, then 150 more. How many degrees in all?
- Add the degrees: 60 + 150 = 210.
- The turns add up.
- So the answer is 210.
Example 3: Another join
- Leo turns 79 one-degree angles, then 15 more. How many degrees in all?
- Add the degrees: 79 + 15 = 94.
- A small turn.
- So the answer is 94.
Words to know
- degree
- A tiny unit for measuring turns.
- angle
- How far something turns.
Watch out
- A full turn is 360, not 100.
- Add degrees to join turns.
- A quarter turn is a right angle.
Try it
- How many degrees in a full turn?
- How many degrees in a half turn?
- How many degrees in a quarter turn?
- Turn 100 degrees, then 50 more. How many in all?
Answers: 1. 360 · 2. 180 · 3. 90 · 4. 150
For grown-upsSpin on the spot a quarter turn, a half turn and a full turn and say how many degrees.