A cone has a circular base, a perpendicular height of 21cm and a semi vertical angle of 30degree calculate the slant height of the cone.Find the area of it's base [take pie to be 22/7]

Answer 1

the slant height s is found using the Pythagorean Theorem:

s^2 = h^2 +r^2
If the angle from the base to the top is θ, then of course the base radius is
r = h tanθ

the area of the base is πr^2

and that's pi, not pie!

Answer 2

Slant height=42

Answer 3

A cone has a circular base perpendicular height of 21cm and semi vertical angel 30 calculate the slant height at the center find the areas of its base

Answer 4

Slant height is 24cm and the area of it base is 38cm^2

Answer 5

Am here to find the vertical height of a cone