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Ewloe Green Primary School

Always Aiming High – Anelu’n Uchel O Hyd

Tuesday 7th July

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).

  • Ewloe Green Primary School, Mold Road, Ewloe, Flintshire, CH5 3AU,
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