Perimeters and areas of sectors - Jamb Mathematics Past Questions and Answers

Question 1:

• JAMB 2018

An arc of a circle of radius 14cm subtends angle 300° at the centre. Find the perimeter of the sector formed by the arc (take π = \(\frac{22}{7}\))

A. 14.67cm
B. 42.67cm
C. 101.33cm
D. 513.33cm

Question 2:

• JAMB 1978

Two triangles have the same areas if

A. Two sides in one triangle are equal to two sides in the other
B. Three sides in one triangle are equal to three sides in the other
C. Two angles in the triangle are equal to two angles in the other
D. Three angles in one triangle are equal to three angles in the other
E. One side and the opposite angle in one triangle are equal to one side and the opposite angle in the other

Question 3:

• JAMB 1979

An arc of circle of radius 2cm subtends an angle of 60^o at the centre. Find the area of the sector

A. \(\frac{2 \pi}{3}\)cm²
B. \(\frac{\pi}{2}\)cm²
C. \(\frac{\pi}{3}\)cm²
D. \(\pi\)cm²

Question 4:

• JAMB 1990

The perimeter of a rectangular lawn is 24m. If the area of the lawn is 35m²; how wide is the lawn?

A. 5cm
B. 7m
C. 12m
D. 14m

Question 5:

• JAMB 1990

The angle of a sector of s circle, radius 10.5cm, is 48 ^o, Calculate the perimeter of the sector

A. 8.8cm
B. 25.4cm
C. 25.6cm
D. 28.8cm