Question

Need help with solving a Geometry problem
Will give out medals and fan.

In the two similar trapezoids below, HE = 20, what is DA?

https://takeexam.next.ecollege.com/CurrentCourse/HS_GMT_L3_S2_03_04_quiz3.gif

Answer 1

Need help soon!

Answer 2

Will give out medals!

Answer 3

pls

Answer 4

help

Answer 5

@gamer456148 can you please help?

Answer 6

Can anyone help?

Answer 7

I can't see the image

Answer 8

click the link

Answer 9

try that

Answer 10

I get a "runtime" error when I click on it. If you copy and pasted, it probably won't let you and it blocked it.

Answer 11

I attached it as a file, is it working now?

Answer 12

Let me guess the choices are 10 20 30 40?

Answer 13

yes

Answer 14

I took this before and got it wrong, so I think you should ask someone else, just being honest?

Answer 15

ok.

Answer 16

I am sorry

Answer 17

can you at least see the picture?

Answer 18

what picture?

Answer 19

I tried to attach it as a file

Answer 20

I can see something

Answer 21

you know similar trapezoids what is the relation between their side?

Answer 22

let's start with the BIG/SMALL

Answer 23

ok

Answer 24

30/10x = 42x/56
use cross multiplication to find x, can you do that?

Answer 25

ok hold on

Answer 26

I got 15/5x = 21x/28

Answer 27

do you know how to cross multiply ?

Answer 28

Not that well

Answer 29

15 * 28 = 5x * 21x
420 = 105 x^2
x^2 = 420/105 = 4
x = sqrt(4) = 2

do u understand the above?

Answer 30

yes

Answer 31

I'm actually not sure what to do from there on

Answer 32

now with this x=2 u can work out the ratio between the sides
DA/HE = 30/10x
u know that HE = 20 and x = 2, so
DA/20 = 30/20
DA = 30

Answer 33

Oh ok! thank you!

Answer 34

yw, I hope you understood what we did here

Answer 35

I do bye!