I am taking a huge geometry test, and I need help with one question-that question being:
How many planes of symmetry does a rectangular solid have? (The rectangular solid is not a cube.)
A.
3
B.
6
C.
9
D.
12
Any help is appreciated. Thanks.
2007-03-30 07:58:27 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
It might be an idea to sketch a cuboid as follows:-
Front face ABCD
Back face EFGH
Right face BHGC
Left face ADFE
Top face ABHE
Bottom face DCGF
Between each of these pairs of faces there will be a symmetrical plane.
Total of 3 symmetrical planes---ANSWER A
2007-03-30 08:13:36 · answer #1 · answered by Como 7 · 0⤊ 0⤋
It depends on the solid.
If all of its dimensions are different then the answer is 3.
If two dimensions can be the same but different to the third(and so it's still not a cube) then the answer is 5. However you weren't given this option so they must have intended a cuboid with all three dimensions different so it's 3.
2007-03-30 08:04:11 · answer #2 · answered by Anonymous · 1⤊ 0⤋
B. 6
2007-03-30 08:03:19 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I'm pretty sure thats it B, but i got a C in accelerated geometry so you might want to see what other ppl say! but anyways doesnt geometry suck?!
2007-03-30 08:08:07 · answer #4 · answered by Smile it's Sarah!! =] 2 · 0⤊ 0⤋
Before you send your homework in, you might want to fix your caps Lock. I think its on!!!
2007-03-30 08:08:54 · answer #5 · answered by Anonymous · 0⤊ 0⤋
A
2007-03-30 08:04:53 · answer #6 · answered by yngrayn 3 · 0⤊ 0⤋
B
2007-03-30 08:04:17 · answer #7 · answered by Anonymous · 0⤊ 0⤋