Question

find angle A,b,c if angle A is 7x -20 degree and angle B 2x + 15 degree and 4x - 10 degree​

Answer 1

Answer:

the sum of triangle=180°

hence,7x-20+2x+15+4x-10=180

13x-15=180

13x=180+15=195

x=195/13

x=15

• hence,a=7x-30=7(15)-30=105-30=75°
• b=2x+15=2(15)+15=30+15=45°
• c=4x-10=4(15)-10=60-10=50°

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