• 2021 December(E23) Math Question 39

    Angles

    - Collinear Points & Triangles

    Sum of angles of a triangle
    Choice D
    ∠B=90o\angle B=90^o
    ∠A=150o−114o=36o\angle A=150^o-114^o=36^o
    ∴∠C=180o−90o−36o=54o\therefore \angle C=180^o-90^o-36^o=54^o

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