Triangle def with the given measurements is rotated in space about side de. which answer gives the solid formed and its surface area? pyramid with surface area a = 1212 • pbase • l triangle with surface area a = 1212 • r • h cone with surface area a = π • r • l π • r2 cone with surface area a = π • r • h

Question

Mathematics

Hadassah Gomez

8 December, 01:43

Triangle def with the given measurements is rotated in space about side de. which answer gives the solid formed and its surface area? pyramid with surface area a = 1212 • pbase • l triangle with surface area a = 1212 • r • h cone with surface area a = π • r • l π • r2 cone with surface area a = π • r • h

+2

Answers (1)

Know the Answer?

Giovanni Blanchard · Answer 1

The rotation of a triangle will form a cone. The surface area of a cone is calculated through the equation,

SA (cone) = πrl + πr²

Hence, for this item the best answer would be cone with surface area a = π. r. l + π. r2, the third choice.