Jambmaths question:
The angles of a polygon are given by 2x, 5x, x and 4x respectively. The value of x is
Option A:
31°
Option B:
30°
Option C:
26°
Option D:
48°
Jamb Maths Solution:
Total sum of angles in 4 sided polygon is 360o$\begin{align} & 2x+5x+x+4x=360{}^\circ \\ & 12x=360{}^\circ \\ & x=30{}^\circ \\\end{align}$
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