Waec Mathematics 1991 Past Questions and Answers

Question 46:

• WAEC 1991

In a given regular polygon, the ratio of the exterior angle to the interior angles is 1:3. How many side has the polygon?

A. 40
B. 5
C. 6
D. 8
E. 12

Question 47:

• WAEC 1991

In the diagram above, O is the center of the circle, |SQ| = |QR| and ∠PQR = 68°. Calculate ∠PRS

A. 34^o
B. 45^o
C. 56^o
D. 62^o
E. 68^o

Question 48:

• WAEC 1991

Find the area of an equivalent triangle of side 16cm

A. 64√3cm²
B. 72√3cm²
C. 96cm²
D. 128√3cm²
E. 128cm²

Question 49:

• WAEC 1991

In the diagram above, PQ and XY are two concentric arc; center O, the ratio of the length of the two arc is 1:3, find the ratio of the areas of the two sectors OPQ and OXY

A. 1:3
B. 1:6
C. 1:9
D. 2:3
E. 4:9

Question 50:

• WAEC 1991

In the diagram above , |AD| = 10cm, |DC| = 8cm and |CF| = 15cmIf the area of triangle DCF = 24cm², find the area of the quadrilateral ABCD.

A. 24cm²
B. 48cm²
C. 80cm²
D. 96cm²
E. 120cm²