Complete the statements below. The sum of the interior angle measures of a triangle must be []. So, m∠1 +...

Complete the statements below.
The sum of the interior angle measures of a triangle must be [].
So, m∠1 + m∠2 + m∠4 = []°.
We are given that m∠1 = 76° and m∠2 = 64°.
Therefore, m∠1 + m∠2 = []°.
And so m∠4 = []°.
From the figure, we can see that m∠3 + m∠4 = []°.
Using the value we already found for m∠4, we find that m∠3 = []°.
Therefore, m∠3 Select m∠1 + m∠2.
This result is an example of the Exterior Angle Property of Triangles.
For any triangle, the measure of an exterior angle
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