passpadi

2019

Mathematics

JAMB

The angles of a polygon are given by 2x, 5x, x and 4x respectively. The value of x is

A.

31°

B.

30°

C.

26°

D.

48°

Correct Answer: 30°

Explanation

Since there are 4 angles given, the polygon is a quadrilateral. Sum of angle in a quadrilateral = 360° ∴ 2x + 5x + x + 4x = 360° 12x = 360° x = 30°

Since there are 4 angles given, the polygon is a quadrilateral. Sum of angle in a quadrilateral = 360° ∴ 2x + 5x + x + 4x = 360° 12x = 360° x = 30°
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