In the diagram, MNR is a tangent to the circle centre O at N and ∠NOS = 108°. Find ∠OSN

  • A 72°
  • B 32°
  • C 36°
  • D 18°
waec 2022mathematics

The correct answer is C. 36°

The sum of angles in a triangle = 180º

(180 - 108)º = 72º

Isosceles triangle has both two equal sides and two equal angles.

 âˆ OSN =  âˆ SON = \(\frac{72}{2}\)

= 36º

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