3 years ago

M 2 = 2x°, m 3 = 5x°, m 1 = 2x + 5x 5x - 2x 180 - 5x 180 - 7x

Mathematics

1 answer:

MaRussiya [10]3 years ago

8 0

We know: the sum of measures of triangle angles is 180°.

Therefore we have the equation

$m\angle1+m\angle2+m\angle3=180^o\to m\angle1=180^o-m\angle2-m\angle3$

Substitute $m\angle2=2x,\ m\angle3=5x$ :

$m\angle1=180-2x-5x=180-7x$

<h3>Answer: 180 - 7x</h3>

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