What is the measure of angle A in the triangle? Enter your answer in the box. m∠A= °
Mathematics
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Question
What is the measure of angle A in the triangle?
Enter your answer in the box.
m∠A=
°
Enter your answer in the box.
m∠A=
°
2 Answer

1. User Answers texaschic101
The interior angles of a triangle add up to 180 degrees.
(2x  10) + (x + 30) + 70 = 180...combine like terms
3x + 90 = 180
3x = 180  90
3x = 90
x = 90/3
x = 30
m < A = 2x  10 = 2(30)  10 = 60  10 = 50 <== m < A 
2. User Answers wagonbelleville
Answer:
m∠A = 50°
Stepbystep explanation:
We know that,
The sum of the measures of the angles of a triangle is 180°.
So, we get,
[tex](2x10)+(x+30)+70=180[/tex]
i.e. [tex]3x+20+70=180[/tex]
i.e. [tex]3x+90=180[/tex]
i.e. [tex]3x=90[/tex]
i.e. x= 30°
So, m∠A = [tex](2x10)[/tex] = [tex]2\times 3010[/tex] = [tex]6010[/tex] = 50°
Thus, measure of angle A is 50°.