(challenger)(give answer with full explanation) question 1.∠1 and ∠2 are complementary angles. ∠2 and ∠3 are supplementary angles. if ∠1 =45°, find the measure of ∠3.
question 2. one of the angle of an isosceles triangle is 100°. is this base angle or a vertical angle. give reasons. calculate the other two angles also.
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