Question

find the base radius of a cone made from a sector of radius 8cm and angle 90°.

Answer 1

Answer:

Youve taken a semi circle (r=12) and formed it into a cone such that the center of the semicircle is the apex, the slant height is the radius and then base circumference is the arc length of the semi circle.

Semicircle: Arc length = 1/2 circ. =(1/2) 2πr = 12π = circumference of cone

Cone: base circference c=2πr. r = c/2π

= 12π/2π = 6 cm.

Step-by-step explanation:

Answer 2

Are u know me

I am durai

I friend with u frist

Now also

Please accept my friend request

Are u know jeyadurai I'd

Remember me