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prestonshelton
Hello!

First you have to find the values that you can

Angles that are across each other are the same

So the one across 80 is 80 and the angle across 70 is 70

You know 4 of the 6 angles

You add these up together

80 + 80 + 70 + 70 = 300

All the angles together make a circle

A circle has a area of 360

So you do 360 - 300 = 60

Since there are 2 angles left you do

60/2 = 30

The answer is 30

Hope this helps!

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