Question

What is the area of this triangle?

Answer 1

http://contentlaunch.ple.platoweb.com/testimagedb/3c/3c26ae946e178951c989e6408fb022a5

Answer 2

@TheSmartOne

Answer 3

What kind of file is that?????????????

Answer 4

geometry

Answer 5

I click it and it makes me download something... I can't even open the file...

Answer 6

which one

Answer 7

ok one sec

Answer 8

what is the base? and what is the height?

Answer 9

http://prntscr.com/77usc0

Answer 10

http://contentlaunch.ple.platoweb.com/testimagedb/3c/3c26ae946e178951c989e6408fb022a5

Answer 11

Those links are no good...

Answer 12

well i don't know why they aren't working

Answer 13

what about the screen shot do they work

Answer 14

yes, the file you uploaded worked.

Answer 15

ok so how do i solve it

Answer 16

what is the length of the base? assuming each block's side is equal to 1

Answer 17

http://prntscr.com/77usc0

Answer 18

6

Answer 19

and the height?

Answer 20

7 i believe

Answer 21

@welshfella

Answer 22

that is correct :)

Answer 23

Now what is

\(\sf \Large Area = \frac{1}{2}\times Base\times Height\)

Answer 24

Plug in base = 6
height = 7

Answer 25

21

Answer 26

correct :)

Answer 27

i know how to do that but how do solve with the (X1,Y1) replacing the number

Answer 28

@TheSmartOne

Answer 29

ohhh, I didn't even see the answer choices :p

Answer 30

@GreatGuy

Answer 31

call the base of the triangle the line segment from (x1, y1) to (x2,y2)
the "length" of this base is the difference from y1 to y2
if you had numbers, for example y1=2 and y2= 7, how would you find the distance from y1 to y2? you would do 7-1 = 6. if you don't know the numbers, you still do the same thing, but use letters: y2-y1

Answer 32

now find the length of the altitude, which is the distance from the base to the vertex at (x3,y3)
notice the distance is in the x direction. what is the difference between x3 and x1 ?