1) Every pyramid is a prism
2) Every pyramid is a polyhedron
3) The bases of all cones are circles
4) All lateral faces of an oblique prism are rectangular regions
All I have to know is true/false but if you have time to explain, I would appreciate it to help me better understand.
2006-09-24 10:50:28 · 5 answers · asked by divinestine 2 in Science & Mathematics ➔ Mathematics
1) true. a pyramid is a special form of prism, with certain angles which i dont reacall now... like any square is a rectangle.
2) true. a polyhedron is defined as a body with n identical triangular planes, based on a evensided n-angle... like a prism has four sides, based on a square, which is an evensided rectangle. (4-angle). and since every pyramid is a prism, (see above) it is also a polyhedron.
3) true. a cone is like a polyhedron, only not based on an n-angle, but on a circle. like a sundae wafer.
4) not sur if i understand the question correctly... what does lateral mean in this contxt? a prism consists of five surfaces, one square and four triangles... so no, not all faces are rectangular.
3
2006-09-24 11:06:33 · answer #1 · answered by wolschou 6 · 0⤊ 0⤋
1 and 3 are true. Is there really a need to explain those? search the net for whatever a polyhedron is
2006-09-24 11:02:44 · answer #2 · answered by emmet s 2 · 0⤊ 0⤋
1-i think a prism is made of glass or clear plastic?
2-true
3-a cone could have an eliptical base
4- they can be a trapezoid or a rhombus and still make a prism
2006-09-24 11:01:54 · answer #3 · answered by Anonymous · 0⤊ 1⤋
1. T
2. T
3. F
4. F
2006-09-24 11:01:57 · answer #4 · answered by locuaz 7 · 0⤊ 0⤋
BWAHAHAHEEHOOHAHA!
Sunday evening and another homeworks not done story. Do your own work.
2006-09-24 11:00:09 · answer #5 · answered by Wurm™ 6 · 0⤊ 1⤋