If a cone is 8.4 cm high and has a vertical angle of 72 degree , calculate the diameter of its base.
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as the vertical angle is 72
half the vertical angle is 36
using trigonometry
∴tan 36 = r/8.4 r = 6.1cm.
∴ the diameter is 12.2cm
half the vertical angle is 36
using trigonometry
∴tan 36 = r/8.4 r = 6.1cm.
∴ the diameter is 12.2cm
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