Question

3. In AABC, if ZA = 40° and ZB = 80°, find the measure of ZC.
4.
Find the value of r if the thi
ion
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Answer 1

Answer:

According to the question, Δ ABC, AB = AC and ∠B = 50°. Since, BC = AB Δ ABC is an isosceles triangle. Let, ∠C = ∠A = x ∠B = 80° (given) We know that, Using angle sum property, Sum of interior angles of a triangle should be = 180o ∠A + ∠B + ∠C = 180° ⇒ x + 80° + x = 180° ⇒ 2x = 180° – 80° ⇒ 2x = 100° ⇒ x = 50° Therefore, ∠C = ∠A = 50° Read more on Sarthaks.com - https://www.sarthaks.com/870277/in-abc-ab-ac-and-b-50-then-c-is-equal-to-a-40-b-50-c-80-d-130