The interior angles of a triangle have measures 100°, (4y+25)° , and (3y+20)° . What is the value of y?

asked Feb 12, 2018 132k views

4 votes

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4 votes

Since the sum of all angles of a triangle is 180°
So 100°+4y+25°+3y+20=180°
145°+7y=180°
7y=180°-145°
7y=35°
y=5°

Marco Fatica answered Feb 12, 2018

8.1k points

4 votes

the sum of triangle is 180 degrees and therefore here's what I would do, it should be 5 degrees.

Tamer answered Feb 17, 2018

by Tamer

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