2005
Mathematics
67ca00ce0c643c71d77dee1f
A sector of a circle has an area of 55 cm2 . If the radius of the circle is 10 cm, calculate the angle of the sector [π = 22/7]
A.
45°
B.
63°
C.
75°
D.
90°
Correct Answer: 63°
Explanation
θ/360×πr2. 55=θ/360×22/7×(10×10)/1. θ=(360×55×7)/(22×10×10). θ = 63°
θ/360×πr2. 55=θ/360×22/7×(10×10)/1. θ=(360×55×7)/(22×10×10). θ = 63°THIS WEEK's
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