Question

the coordinates of the of the vertices of a triangle are A(1,3), B(9,10), and C(11,18). find the perimeter of triangle ABC. Find the perimeter of the triangle when the coordinates are multiplied by 3.

Answer 1

anyone please help meh?

Answer 2

do you know the formula of perimeter of triangle ?

Answer 3

you um add the three sides up?

Answer 4

wait

Answer 5

ok

Answer 6

have you finally found an answer? it's 2 here :O

Answer 7

yayyyyyyyyyyyyyy

Answer 8

first answer is 36.89

Answer 9

at least give me the three numbers to add...

Answer 10

ok

Answer 11

A(1,3), B(9,10), and C(11,18). then the sides will be AB,BC,CA

Answer 12

so now you can find the sides ig

Answer 13

just need the three sides' number that all

Answer 14

AB=B-A=(9-1)(10-7)=8i+3j now find it's magnitude

Answer 15

btw when the sides all multiply by 3 the perometer just get multiplied by 3 right?

Answer 16

does it have to be that complicated?

Answer 17

yes

Answer 18

first you have to find sides by distance formula then have to add then that's all .

Answer 19

\[\sqrt{(y_1+y_2)^2+(x_1+x_2)^2}\]

Answer 20

that's the formula for finding a side i THINK

Answer 21

yes

Answer 22

but when i plugged it in i got \(\sqrt{113}\)

Answer 23

but how do u add them TOGETHER :O

Answer 24

well... you are a HUMAN calculator, right?

Answer 25

:P

Answer 26

Use matrix method

Answer 27

?

Answer 28

here's what i need: i need the three numbers for the sides of the triangle, the answers for the 3 questions, and a explanation for the last question.

Answer 29

Well let me think 2 mins plz

Answer 30

ok

Answer 31

the formula to find the sides are --
Distance from A to B =
In that way you can find all the sides and then for the parameter
the formula is , parameter = AB+BC+AC