WAEC Mathematics Past Questions & Answers - Page 241

1,201.

The length of an arc of a circle of radius 5cm is 4cm. Find the area of the sector

A.

\(1\frac{3}{5}cm^2\)

B.

2cm2

C.

8cm2

D.

10cm2

E.

20cm2

Correct answer is D

No explanation has been provided for this answer.

1,202.

Calculate the perimeter of the trapezium PQRS

A.

24cm

B.

36cm

C.

48cm

D.

72cm

E.

520cm

Correct answer is C

Using Pythagora's rule for △PSM

Hyp\(^2\) = Opp\(^2\) + Adj\(^2\)

5\(^2\) = Opp\(^2\) + 4\(^2\)

→ Opp\(^2\) = 25 - 16

→ Opp = √9 = 3

base SR = 18 + 3 = 21

base PQ = 18

side PS = 5

side QR = 4

perimeter of the trapezium PQRS = 21 + 18 + 5 + 4 = 48cm

1,205.

In the diagram PQ is a diameter of circle PMQN center O, if ∠PQM = 63o, find ∠MNQ

A.

58.5o

B.

44o

C.

35o

D.

31.5o

E.

27o

Correct answer is E

No explanation has been provided for this answer.