This is similar to angles in a quadrilateral, but remember, the angles always add up to 180 degrees, not 360.
Let's try this question:
Find the angle labelled x.
Ok, so first we add the two angles we know together:
75 + 50 = 125 degrees
And now we subtract this from 180 degrees:
180 - 125 = 55 degrees
So now we know that angle x = 55 degrees.
Test your knowledge on this with our short quiz:
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