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14-10-2017
Mathematics

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The measure of angle A = ____ degrees.

The measure of angle A degrees class=

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14-10-2017

We know that angles A and B are congruent because they are across from congruent sides. Then since all the angles will add to 180 degrees, we have:
[tex]2(6y+1)+(21y+13)=180[/tex]

Solve for y and then plug it into the formula for angle A, which is [tex](6y+1)[/tex].

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