purpletulip48 purpletulip48

26-02-2021
Mathematics

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What is the measure of angle A in the triangle?

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lauralazda1 lauralazda1

26-02-2021

Angles in a triangle add up to 180 degrees.
(2x-10)+(x+30)+70=180
(2x-10)+(x+30)=110
3x+20=110
3x=90
x=30
so A:
2(30)-10
=50

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