Question

verify that the points (2,1) (4,0) and (5,7) form the vertices of a right triangle.

Answer 1

draw it.

Answer 2

i dont know how to

Answer 3

Ok, wait.

Answer 4

wait dont i just have to plot the points?

Answer 5

can u join me @ twiddla?

Answer 6

or no

Answer 7

Oh Yes.
& chk whether there is a 90* angle or not.

Answer 8

it looks like a right angle forma at the point (2,1)

Answer 9

then its True.

Answer 10

huh? why?

Answer 11

coz u hav to verify that does these points make a right angled triangle or not.

Answer 12

so we dont use the distance formula no where in there?

Answer 13

there is no such thing written in the ques.

Answer 14

its and example under my notes for the distance formula

Answer 15

an*

Answer 16

u use pythagorus :|

Answer 17

then u hav to show the working, u should use pythagoras.

Answer 18

Yeah, he is correct.

Answer 19

yeah the distance formula

Answer 20

yup.

Answer 21

but how? theres three points?

Answer 22

u hav to take 2, one by one.

Answer 23

(2,1) (4,0) first these two.

(4,0) (5,7) then these two.

(2,1) (5,7) finally these two/.

Answer 24

okay thanks i'll calculuate it and then after i calculate what will indicate i have a vertices?

Answer 25

then use those in Pythagoras Theorm.

Answer 26

huh?

Answer 27

huh?\[\sqrt{5},5\sqrt{2},3\sqrt{5}\]

to say a^2+b^2=c^2

Answer 28

those are the answers i got

Answer 29

Yeah, the formula is correct.

Answer 30

but what are ABC?
name the lenghts.

Answer 31

oh and sorry i just saw the thing about twiddla i dont have a twiddla account whats twiddla? anything like twitter?

Answer 32

well there if any1 wants any steps like thing, there v can draw & show it to them.

Answer 33

http://www.twiddla.com/568385

Answer 34

may i start another question my computer is freezing

Answer 35

lool, Ok sure