1. Lines, Angles and Shapes
11 April 2017
Here are some facts about angles that you should know
A square corner like this is called a:
RIGHT ANGLE
It measures 900 (90 degrees)
900

2. 1800 on a straight line Push Push 900 900 Push Push 900 900
= 1800
1800 on a straight line

3. b d a c Prove that x + y + z = 1800 y x z
Line ab is parallel to line cd so… c

4. This angle must be x degreesy x z x
This angle must be x degrees
Line ab is parallel to line cd so c

5. This angle must be y degrees
These are scissor angles so d y x z x c

6. This angle must be y degreesx z x
These lines make corresponding angles so c

7. y d y y x z x
x, y and z make a straight line so these angles must add up to give a total of 1800 c