SSC CGL 7 Sep 2016 Paper

Question : 68 of 100

Marks: +1, -0

In an isosceles triangle ABC, AB = AC, XY ||BC. If ∠A = 30°, then ∠BXY = ?

Solution:

Δ ABC is an isosceles triangle
∴ ∠ ABC = ∠ ACB
=

{180°-30}/{2}

= 75°
XY || BC
∴ ∠ AXY = ∠ ABC = 75°
∴ ∠ BXY = 180° - 75° = 105°

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