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Geometry 25 Online
OpenStudy (anonymous):

Which of the following is not a true statement? 1. All prisms are three-dimensional. 2.The lateral faces on all prisms are rectangles. 3.All prisms have a pair of congruent bases. 4.The total number of faces is the same for all prisms.

OpenStudy (anonymous):

i think it is 4 but i don't know if am right

ganeshie8 (ganeshie8):

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ganeshie8 (ganeshie8):

total number of faces is not same. it depends on the base of the pyramid. so 4 is incorrect.

OpenStudy (anonymous):

so its 3

OpenStudy (anonymous):

r u there

OpenStudy (anonymous):

3

OpenStudy (anonymous):

thank u

ganeshie8 (ganeshie8):

all prisms are three dimensional, cuz a prism is a SOLID.

OpenStudy (anonymous):

thank u

OpenStudy (anonymous):

a solid can b 2-D also @ganeshie8

ganeshie8 (ganeshie8):

nope. solids are three dimensional

OpenStudy (anonymous):

what about a plane lamina

ganeshie8 (ganeshie8):

i have no idea wat u talking about

OpenStudy (anonymous):

it says in the question which is a not true statement

ganeshie8 (ganeshie8):

ive read it as 'which of the following is a true statement' before hmm

OpenStudy (anonymous):

yeah but i can only pick one?

ganeshie8 (ganeshie8):

then go with ur gut, tick 4 :)

OpenStudy (anonymous):

am sorry if am giving u bothering u

ganeshie8 (ganeshie8):

not at all, 4 is not true for sure. so you're right!

OpenStudy (anonymous):

thank u soooo much

ganeshie8 (ganeshie8):

np :)

ganeshie8 (ganeshie8):

actually only 4 is not true. rest everything is true

OpenStudy (anonymous):

lol

ganeshie8 (ganeshie8):

1) all prisms are 3 dimensional - true 2) lateral faces are rectangles - true (can be seen easily) 3) have pair of congruent bases - true (yes they have two bases that are congruent) 4) faces are same (NO)

OpenStudy (anonymous):

ur best gtg thank u

ganeshie8 (ganeshie8):

yw :)

Directrix (directrix):

2.The lateral faces on all prisms are rectangles. False. (If the prism is oblique, then the lateral faces are parallelograms. See attached drawing from http://rhlmath.com/prisms.html . 4. 4.The total number of faces is the same for all prisms. False as shown above by @ganeshie8 @school1234

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