Question

Δ ABC is isosceles. Angles B and C are congruent. If m∠B = (5x + 5)° and m∠C = (7x - 25)°, Find m∠A.A) 10° B) 15° C) 20° D) 80°

Answer 1

Answer:

b.15

Step-by-step explanation:

a+b+c=180

7x-25+5x+5+x=180

13x-20=180

13x=200

x=200÷13=15.3