Q8 of 266 Page 3

In a

. Also, . Find the three angles.

Sum of angles of a triangle = 180°


Given,


.


⇒ x + 3x – 2 + y = 180


⇒ 4x + y = 182 ------ (1)


Also, .


⇒ y – 3x + 2 = 9


⇒ y – 3x = 7 ------- (2)


(1) – (2)


⇒ 4x + y – y + 3x = 182 – 7


⇒ 7x = 175


⇒ x = 25°


Thus, y = 75 + 7 = 82°


∠A = 25°


∠B = 3X – 2 = 73°


∠C = 82°


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