The surface area of a right cone which has a base diameter of six units and a height of eight units is:

Step-by-step explanation:

The surface  area of right cone is calculated by the following formula

Where r is the radius of the cone and h is the height

In this case we know that the diameter d of the base is:

So the radius is:

and

So the area is:

Step-by-step explanation:

The surface area of a right cone is given by

The relation between the slant height l, the radius r, and the height h, is

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17

answer: a

step-by-step explanation: the answer is a due to the rule of symmetry; that a line of symmetry must divide a figure into 2 pieces that are the exact same, only reflected over a line of symmetry. b and c do not have lines of symmetry and would not divide the figure evenly, thus making the answer a.