Question

Rotate an isosceles right triangle around a line that contains the triangle's hypotenuse

Answer 1

See attachment 2 for the rotation

Explanation:

The question has a missing figure

See attachment 1 for the missing figure of the isosceles right-triangle

Required

Rotate around the hypotenuse

From the attachment, the hypotenuse is along the blue vertical line along the y-axis.

So, when the isosceles triangle is rotated around the hypotenuse, the result of the rotation we get a composite figure that has two congruent solids.

Which is a cone of radius and height equal to half of the hypotenuse

See attachment 2 for the rotation