Question

A right triangle is rotated around a line that includes one of the legs of the triangle. What figure is created

Answer 1

That would be a cone. 

Answer 2

When a right angle triangle is rotated about any of its leg a cone is formed.

Explanation:

We are given a right triangle is rotated around a line that includes one of the legs of the triangle.

We have to find which geometrical figure will it produce.

When a right angle triangle is rotated about any of its leg a three dimensional figure having circle at its base and lines connecting a common point at the top known as apex such a figure is known as cone. (As shown in figure below)