Angle of the sector

Find the angle of the sector of a circle radius of 20 units where the area is equal to the lateral area of a cone with a radius of 8 units.

Your answer:

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You need to know the following knowledge to solve this word math problem:

algebra

rearrange variables

arithmetic

square root

solid geometry

cone

planimetry

circle
area of a shape
circular sector

Units of physical quantities

area
angle

Grade of the word problem

practice for 13 year olds
practice for 14 year olds

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