Answer:
Angle A = 50
Step-by-step explanation:
We know the 3 angles of a triangle add to 180
A + B+C = 180
2x-10 + 70 + x+30 = 180
Combine like terms
3x+90 = 180
Subtract 90 from each side
3x+90-90=180-90
3x = 90
Divide by 3
3x/3 = 90/3
x = 30
We want to find angle A
Angle A = 2x-10
= 2(30) -10
= 60-10
= 50
Answer:
m∠A= 50
Step-by-step explanation:
Given "A triangle labeled ABC with angle A as parenthesis two X minus ten parenthesis degrees, angle B as seventy degrees and angle C as parenthesis X plus thirty parenthesis degrees",
it can be written out as:
m∠A= 2x-10
m∠B= 70
m∠C= x+30
As the sum of interior angles = 180 for a triangle,
2x-10+70+x+30=180
3x=180-30-70+10=90
x=30
m∠A= 2(30)-10 =60-10
= 50
