What is the size of each interior angle of a 12-sided regular polygon?

Assessment: JAMB UTME - Mathematics - 2011 Subject: General Mathematics

Question 1 Report

120o

150o

30o

180o

Answer Details

Interior angle = (n - 2)180
but, n = 12
= (12 -2)180
= 10 x 180
= 1800
let each interior angle = x
x = $\frac{(n - 2) 180}{n}$
x = $\frac{1800}{12}$
= 150o

Read lesson note on Angles (WAEC)

Read lesson note on Triangles And Polygons (WAEC)

Angles

Triangles And Polygons

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