07.07.20- To find missing angles in a straight line or triangle.

Today you will be finding missing angles.

Angles on a straight line = 180 degrees.

The internal angles of a triangle = 180 degrees.

We can calculate missing angles by subtracting the known angles from 180.

For example, number 1 in "Angles in a straight line 1"

To find the missing angle, I would subtract 30 from 180.

180-30= 150

So the missing angle is 150 degrees.

Today I would like you to complete angles in a straight line 1 or 2, or angles in a triangle.

Remember if an angle is marked with a small square then it is a right angle (90 degrees).