# Estimate acute and obtuse angles using the standard unit of degrees

I can estimate acute and obtuse angles using the standard unit of degrees.

# Estimate acute and obtuse angles using the standard unit of degrees

I can estimate acute and obtuse angles using the standard unit of degrees.

## Lesson details

### Key learning points

- You can estimate angles by comparing to a right angle of 90 degrees.
- Half a right angle is 45 degrees.
- One and a half right angles are 135 degrees.

### Common misconception

Pupils significantly over or under-estimate the size of angles, particularly when the initial line of the angle is not vertical or horizontal.

Encourage pupils to rotate the angle so that one of the lines is vertical or horizontal, or if possible, look at the angle from a different point of view which may help to view a line of the angle from a vertical or horizontal position.

### Keywords

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

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

### 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

Loading...