Polygons - Mathematics Jamb Past Questions and Answers

Question 21 :

• JAMB 1986

A regular polygon of n sides has 160^o as the size of each interior angle. Find n

A. 18
B. 16
C. 14
D. 12

Question 22 :

• JAMB 1987

Three angles of a nonagon are equal and the sum of six other angles is 1110o. Calculate the size of one of the equal angles

A. 210^o
B. 150^o
C. 105^o
D. 50^o

Question 23 :

• JAMB 1987

Three angles of a nonagon are equal and the sum of six other angles is 1110^o. Calculate the size of one of the equal angles.

A. 210^o
B. 150^o
C. 105^o
D. 50^o

Question 24 :

• JAMB 1987

In the figure, find the value of x

A. 110^o
B. 100^o
C. 90^o
D. 80^o

Question 25 :

• JAMB 1988

Four interior angles of a pentagon are 90^o - x^o, 90^o + x^o, 110^o - 2x^o, 110^o + 2x^o. Find the fifth interior angle

A. 110^o
B. 120^o
C. 130^o
D. 140^o