Question

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Answer 1

a. 3x+1+4x+5+90 = 180 (angle sum property)

7x+96 = 180

7x = 180-96

x = 84/7

x = 12

b. x-10+4x-30+70 = 180(angle sum property)

5x+30 = 180

5x = 180-30

x = 150/5

x = 30

c. using angle sum property on ∆HGF

x+50+80 = 180

x = 180-130

x = 50

hope it helps.........