Question

Question is: For each triangle below, find the unknown interior angle marked a and the exterior angle marked b.

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Answer 1

Answer:

a) 63+ 62 +a = 180

125 + a = 180

a= 180 -125= 55 degree

180- 55= 125 degree = b

b) 42+ 90 + a = 180

132 + a =180

a = 180 - 132

a = 48 degree

b= 180- 48 = 132 degree

Hope that helps

Answer 2

Answer:

(a) a= 180-(62+63)

180-125

65

because sum of all angles of triangles is 180

b=62+63=125

because of exterior angle property

(b) a=180-(42+90)

180-132

48

b=42+90

132

reason for this is same as above