Question

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Answer 1

Step-by-step explanation:

a) 82+55+x=180 (angle sum property of triangle)

137+x=180

x= 180-137=43

b)77+x=124 (exterior angle sum property)

x=124-77=47

Answer 2

Step-by-step explanation:

(A) Let the triangle ABC

we know that

In a triangle sum of all angles is equals to 180°

here <A = 82°and <B = 55°

so, <82°+ <55°+ <x =180°

<137° + <x= 180°

<x= 180°-<137° ( by using cros multiplication )

<x= 43°