Next week the children will consolidate and revise all Year 5 learning associated with geometry which include work on angles, translations and shape.
What are angles?
Angles are a measure of turn. Follow these simple rules for angles:
Angles are measured in degrees. The sign for degrees is °.
One whole turn is 360°. a is an example of a whole turn.
One quarter turn is 90° or a right angle. b is an example of a quarter turn.
One half turn is 180° or a straight line. c is an example of a half turn.
Types of angles
a) An angle less than 90° is acute.
b) An angle between 90° and 180° is obtuse.
c) An angle greater than 180° is reflex.
Adding up angles
- The three angles inside a triangle always add up to 180°. This is shown by aand b in the example.
- All angles at a point always add up to 360°. This is shown by c in the example.