Question

1. Triangle
2. Rectangle
3. Circle
4. Cylinder
5. Cone
a. shape created when a right triangle is rotated about the y-axis
b. parallel cross section of a sphere
c. shape created when a rectangle is rotated about the y-axis
d. perpendicular cross section of a pyramid
e. perpendicular cross section of a cylinder

Answer 1

@sammixboo

Answer 2

Have you considered sketching a right triangle and then visualizing (or sketching) what figure you obtain by rotating this triangle about the y-axis?

Answer 3

no.

Answer 4

Your job here seems to be matching up the five given shapes with the five given descriptors.

Sketching situations such as these often makes the answers obvious.

Answer 5

k.