Question

can someone help me

Answer 1

with what?

Answer 2

do u see it

Answer 3

i need help with some of my hw problems i will post them in a link

Answer 4

go for it

Answer 5

ty

Answer 6

well trapezoids look like this

these are just two simple common ones.. do you see anything in common? or what the answer is by looking at the image?

Answer 7

i pick A then

Answer 8

you haven't picked it have you... :o

Answer 9

no

Answer 10

i mean guess lol my bad

Answer 11

A states that a trapezoid has no parallel sides, and ... i might have misguided you with my drawings.. they aren't prefect.. but as you can notice, both of these have parallel lines. the top and bottom are parallel

its the sides that aren't, they are bound to cross each other if the lines continue forever..
get what I'm saying?

Answer 12

yes

Answer 13

no sometimes the trapezoids are flipped, so they look like this instead

but still, there is always a pair of parallel sides

so what would your guess be now?

Answer 14

B

Answer 15

I would agree with you now

Answer 16

:)

Answer 17

a quadrilateral that has 4 congruent sides would be a parallaram ?

Answer 18

true... I had to look that up lol

Answer 19

xD

Answer 20

wait i think its a rectangle

Answer 21

well it could be either a square or a rhombus actually... and a square is considered a special rectangle...

Answer 22

okay so a rectangle is not an option

Answer 23

but all squares, rectangles, and rhombuses are parallelograms and they are all quadrilaterals ...

look at this:

http://www.mathsisfun.com/quadrilaterals.html

Answer 24

it'll define what a parallelogram is; that is a good website, my sister recommends it..

Answer 25

:) i believe it is a parallogram

Answer 26

I'd think so too, but is either a rhombus or a square a choice?

Answer 27

yes but para is both of those

Answer 28

if both are given in the choices then I'd go for parallelogram, but if only one then I'd go for that one, since a rectangle is also a parallelogram, and not all of its sides are congruent (that is if congruent means equal length)

Answer 29

okay i they were both in so i chose parallogram thanks

Answer 30

can we do another

Answer 31

sure, one more

Answer 32

here it is :)

Answer 33

again, I had to use a little help :p.. but its good, I learn for a next time:

http://www.mathopenref.com/polygonconcave.html
this is what a concave polygon is, and with this, you should be able to get your answer

Answer 34

I Believe B is the right choice

Answer 35

we actually remember what the definition is

"Definition: A polygon that has one or more interior angles greater than 180°
(Result: some vertices point 'inwards', towards the the center.)"

so all you have to do to see if a polygon is concave is check if one of the points points inwards..

Answer 36

i believe it is concave

Answer 37

yea, what do you mean though? still think its B?

Answer 38

yeah i also might think its C

Answer 39

well think about it, for it to be concave, one of the four points has to be pointing inwards. or like the word concave... it has to "cave" into the figure.

Answer 40

In B, Figure B...



all points are pointing outwards. None are "caved" in. and by definition, none of the interior angles is greater than 180 degrees... do you see this?

Answer 41

yes

Answer 42

what about c

Answer 43

now C

Answer 44

what can you tell me about its points? and its interior angles?

Answer 45

outward

Answer 46

all of them?

Answer 47

what about figure A

Answer 48

No figure A is a convex trapezoid or what we'd call a normal trapezoid...looks like an isosceles trapezoid...

Answer 49

I want you to look at C again

Answer 50

Mostly because the answer is C, but i'd like you to understand why

Answer 51

okay

Answer 52

the little curved lines are the interior angles