Polygons - Jamb Mathematics Past Questions and Answers

Question 26:

• JAMB 1988

For which of the following exterior angles is a regular polygon possible? i. 35° ii. 18° iii. 15°

A. I and ii
B. Ii only
C. Ii and iii
D. Iii only

Question 27:

• JAMB 1989

A regular polygon of (2k + 1) sides has 140° as the size of each interior angle. Find k

A. 4
B. 4\(\frac{1}{2}\)
C. 8
D. 8\(\frac{1}{2}\)

Question 28:

• JAMB 1990

Each of the interior angles of a regular polygon is 140^o. How many sides has the polygon?

A. 9
B. 8
C. 7
D. 5

Question 29:

• JAMB 1991

If the exterior angles of a pentagon are x°, (x + 5)°, (x + 10)°, (x + 15)° and (x + 20)°, find x

A. 118^o
B. 72^o
C. 62^o
D. 36^o

Question 30:

• JAMB 1993

A rectangular polygon has 150^o as the size of each interior angle. How many sides has the polygon?

A. 12
B. 10
C. 9
D. 8