Mathematics for IGCSE & O level - Angles (Section 1 - No. 46)
In a quadrilateral, the angles are x, 2x, 3x, and 4x. What is the value of the smallest angle?
36°
45°
72°
90°
Explanation
Sum of angles is 360. x+2x+3x+4x=360 -> 10x=360 -> x=36
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