Answer:

Number 8 The total surface area of a cone is the sum of the area of its base and the lateral (side) surface. Since the base of a cone is a circle, we substitute 2πr for p and πr2 for B where r is the radius of the base of the cylinder. ...

Number 10 The surface area of a sphere is defined as the region covered by its outer surface in three-dimensional space. A Sphere is a three-dimensional solid having a round shape, just like a circle. The formula of total surface area of a sphere in terms of pi (π) is given by: Surface area = 4 π r2 square units.

#Perfect.

Answer:

8.

10.there has no face

Step-by-step explanation:

sorry di ko alam yung 8