the base radius of the cone is 250/360 * 70 = 48.6 cm
(a) sinθ = 48.6/70
(b) ? You just said it was 110°
a sector with an angle 110 degree at the centre of a circle is cut away from a circular piece of paper of radius 70cm,the remaining part is folded to form a cone, find:
a:vertical angle of the cone
b:angle of the sector
1 answer
1 answer