Question 9

Jambmaths question: 

From the diagram above, the value of x is

Option A: 

90o

Option B: 

110o

Option C: 

100o

Option D: 

80o

Jamb Maths Solution: 

Sum of two opposite angles of cyclic quadrilateral are supplementary (i.e. 180o)

$\angle MNS+\angle MLS=180{}^\circ $

$100{}^\circ +x=180{}^\circ $

$x=80{}^\circ $

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