What is the measure of angle A in the triangle?Enter your answer in the box. m∠A= °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
Accepted Solution
A:
Answer:Angle A = 50Step-by-step explanation:We know the 3 angles of a triangle add to 180A + B+C = 1802x-10 + 70 + x+30 = 180Combine like terms3x+90 = 180Subtract 90 from each side3x+90-90=180-903x = 90Divide by 33x/3 = 90/3x = 30We want to find angle A Angle A = 2x-10 = 2(30) -10 = 60-10 = 50