An arc of a circle of radius 14cm subtends angle 300o at the center. Find the perimeter of the sector formed by the arc

Assessment: WAEC SSCE - General Mathematics - 2005 (Objective) Subject: General Mathematics

Question 1 Report

An arc of a circle of radius 14cm subtends angle 300o at the center. Find the perimeter of the sector formed by the arc
Answer Details
To find the perimeter of the sector, we need to find the length of the arc and the length of the two radii that form the sector. The circumference of a circle with radius 14cm is given by: C = 2πr = 2π(14) = 28π Therefore, the length of the arc subtending an angle of 300 degrees is: L = (300/360) × 28π = 7π/3 × 28 ≈ 73.33cm The length of the two radii that form the sector is: 2r = 2 × 14 = 28cm Therefore, the perimeter of the sector is: P = L + 2r ≈ 73.33 + 28 = 101.33cm Hence, the correct option is (c) 101.33cm.
Read lesson note on Circles (WAEC)
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