Asked by Victor
A sector of a circle of radius 7cm subtending an angle of 270 degree at centre of the circle is use to form a cone?
(A)find the base radius of the cone.
(B)calculate the area of the base of the cone.
(A)find the base radius of the cone.
(B)calculate the area of the base of the cone.
Answers
Answered by
Esther
Angle/360=length Of An Arc/pi*diameter
Answered by
marvellous
what is the answer
Answered by
aminu
it is very important for me
Answered by
Esther
Yes
Answered by
Emmanuel
Solve
Answered by
Marvellous
270/360 *2*22/7*7=33
2πr=33
2*22/7=33
44/7*x=33
X=33*7/44
X=5.25
2πr=33
2*22/7=33
44/7*x=33
X=33*7/44
X=5.25
Answered by
John
270/360
Answered by
Vivian
(b)
πr^2
=22/7×21/4×21/4
=693/8cm^2 ~87cm^2
πr^2
=22/7×21/4×21/4
=693/8cm^2 ~87cm^2
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