Calculate the perimeter, in cm, of a sector of a circle of radius 8cm and angle 45o

Assessment: JAMB UTME - Mathematics - 2016 Subject: General Mathematics

Question 1 Report

Calculate the perimeter, in cm, of a sector of a circle of radius 8cm and angle 45o
Answer Details
Perimeter = OP + OQ + PQ
= 8 + 8 + PQ
length PQ =  θ 360 × 2 π r
=  45 360  x 2 x  π  x 8
= 2 π
Perimeter of sector 2r + L
Where l = length of arc and r = radius
∴ P = 2(8) + 2 π
= 16 + 2
Read lesson note on Coordinate Geometry (JAMB)
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