Question

perpendicular cross section of a pyramid Answer 1
perpendicular cross section of a cylinder Answer 2
parallel cross section of a sphere Answer 3
shape created when a rectangle is rotated about the y-axis Answer 4
shape created when a right triangle is rotated about the y-axis

Answer 1

choices:
triangle
cylinder
cone
ellipse
circle

Answer 2

@LastDayWork

Answer 3

these were the questions i was messaging you about

Answer 4

for the first one i got triangle and for the second one i got circle and for the other ones i dont know those ones

Answer 5

"for the first one i got triangle and for the second one i got circle"
Correct

Now try to cut a sphere into two equal parts. What do you think will be its cross-section ??

Answer 6

will it be cylinder

Answer 7

Circle :|

Answer 8

it will be circle also

Answer 9

A cross-section is always a planar shape.
Rotation creates a 3D shape

Answer 10

thats for the third one correct

Answer 11

circle is for the third one right

Answer 12

"shape created when a rectangle is rotated about the y-axis
shape created when a right triangle is rotated about the y-axis"

I need to see the diagram for these..

Answer 13

there is no diagram

Answer 14

Yep! Answer 3 is circle

Answer 15

so whats the one for this one:
"shape created when a rectangle is rotated about the y-axis"

Answer 16

I need a diagram for the last two parts.

Answer 17

you want me to find one on the internet?

Answer 18

i typed that question in on Google images and this popped up
https://www.google.ae/search?q=shape+created+when+a+rectangle+is+rotated+about+the+y-axis&client=firefox&hs=9zQ&rls=org.mozilla:en-US:unofficial&channel=fflb&source=lnms&tbm=isch&sa=X&ei=NpPzUvvtJ4GW0AXk-YHQDA&ved=0CAkQ_AUoAQ&biw=1366&bih=640

Answer 19

Wait a sec..the original question came without a diagram ??

Answer 20

i said that and you said you needed one

Answer 21

In that case, consider this diagram..


Tell me, which 3D shape will appear when you rotate the rectangle (very fast)