# Describe static angles using the standard unit of degrees when compared to a right angle

I can describe static angles using the standard unit of degrees when compared to a right angle.

# Describe static angles using the standard unit of degrees when compared to a right angle

I can describe static angles using the standard unit of degrees when compared to a right angle.

## Lesson details

### Key learning points

- There are 90 degrees in a right angle
- Acute angles are between 0 and 90 degrees
- Obtuse angles are between 90 and 180 degrees
- Reflex angles are greater than 180 degrees

### Common misconception

90 degrees is classified as an acute angle and 180 degrees is classified as an obtuse angle.

Provide opportunities for pupils to classify angle sizes and build towards understanding that acute angles are between 0-89 degrees and obtuse angles are between 91-179 degrees. Classifying multiples of right angles as a separate group may help.

### Keywords

Degrees - A degree is a unit of measure for angles.

Estimate - To estimate is to find a value that is close enough to the right answer, usually with some thought or calculation involved.

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Video

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## Starter quiz

### 6 Questions

A quadrilateral with two pairs of parallel sides.

A quadrilateral with four equal sides and four right angles.

A quadrilateral with exactly one pair of parallel sides.

## Exit quiz

### 6 Questions

90°

180°

360°