Base area calculation of a cone
volume calculation
surface area calculation
PLEASE HELP ME

base is just radius times pi times 2 and all that times the height divided by 3

volume is just its base times height

surface area it depends on what you're doing if its a rectangular prism or a triangular prism.

for rectangle one : width times height times two plus height times length times two plus width times length times two.

for triangular one: two times area of base (triangle) plus perimeter times height.

Step-by-step explanation:

Volume of a cone = ( π • r² • height ) ÷ 3

Base Area = PI * radius^2

"side" surface area = PI * radius * slant height

where "slant height" is NOT the perpendicular cone height.  It is the length of the "tilted"side.

TOTAL Cone Area = Base Area + side surface area

Source: https://www.1728.org/diamform.htm

(Scroll to the bottom of that page.)

Step-by-step explanation:

None of them have perpendicular lines except for the blue one if I am seeing right.