Question

Diagonal cross section of a cylinder
2. Cross section parallel to the base of a cone
3. Shape created when a semi-circle is rotated about the y-axis
4. Diagonal cross section through the widest part of a sphere
5. Perpendicular cross section of a cone
a. triangle
b. great circle
c. ellipse
d. circle
e. sphere

Answer 1

#2 is circle
#3 is sphere
#1 is ellipse
#5 is triangle
#4 is great circle

Answer 2

@grex10

Answer 3

thank you

Answer 4

YW...