Question

find the angles with proper reason
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Answer 1

Answer:

c= 180-80= 100° angle of a straight line

b= 180-115 = 65° same reason

a = 180-(100+65)= 15° sum of angles of a triangle

Answer 2

Answer:

c+80°=180° ( straight angle)

c=180-80

c=100°

similarly b+115°=180°( straight angle)

b=180-115

b=65°

now a+b+c=180° (angle sum property)

a=180-b-c

a=180-65-100

a=180-165

a=15°