# StudySquare

# SQA National 5 Maths Basic geometry terms

This page covers the following topics:

1. Angles at a point

2. Angles at a point on a straight line

3. Vertically opposite angles

4. Alternate angles

5. Corresponding angles

The sum of the angles at a point is 360º. This property can be used to find the value of missing angles.

The sum of the angles at a point on a straight line is 180º. This property can be used to find the value of missing angles.

Vertically opposite angles are angles which are opposite each other at a point. These angles are equal.

Given two parallel lines, the marked angles on the line joining the two parallel lines are equal. These angles are called alternate angles or Z angles.

The angles between two parallel lines and a third intersecting lines, as shown on the diagram, are equal. These angles are called corresponding angles or F angles.

# 1

State all the pairs of vertically opposite angles on the given diagram.

# 2

Calculate the value of y.

# 3

Calculate the value of angle a.

# 4

Find the value of b, given that d = 78º and f = 83º.

# 5

Use alternate angles to find the value of θ.

End of page