Question

Find the perimeter of the shape.
12.4 units
13.4 units
15.1 units
16.8 units

Answer 1

u just all all the sides up-

Answer 2

so its 13.4????

Answer 3

is that what u got when u added all the sides up

Answer 4

I got -3.8

Answer 5

so im confused-

Answer 6

so to calcule the sides lengths just use the distance formula

Answer 7

oh wait so is it 12.4?

Answer 8

do you know the distance formula for the distance between two points in a coordinate plane ?

Answer 9

not really-

Answer 10

d = sqrt [(x_2 -x_1)^2 *(y_2 -y_1)^2]

Answer 11

so I have to use this formula when adding up each side?

Answer 12

to get the distance between these points in this way to get the length of these sides yes just use thie formula

Answer 13

and um how exactly do I use the formula? where do I type in the points of the sides

Answer 14

for every side length you need use it separate using the coordinates of these given points

Answer 15

for point E x = ? and y = ?

Answer 16

for point F the x = ? and y = ?

this for example to calcule the length of side EF

Answer 17

okay so G is (-1,3) and F is (2,4)

Answer 18

so it would be (2-[-1])2+(4-3)2

Answer 19

right?

Answer 20

H to G: \(2\)
G to F: \(\sqrt{10}\)
F to E: \(\sqrt{13}\)
E to H: \(\sqrt{13}\)
just use the pythagorean theorem

add them together and find the approximate value