Question

What is the perimeter of the triangle shown on the coordinate plane, to the nearest tenth of a unit?

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Answer 1

A. 14.8 units
B. 15.0 units
C. 19.7 units
D. 24.8 units

Answer 2

@narissa

Answer 3

Oh I'm not good at this I had to get 3mar to help me

Answer 4

Just use the distance formula between each point

Then add up the values which will be your perimeter

Answer 5

Distance between arbitrary points A and B



\[\large D = \sqrt{(B_x - A_x)^2 + (B_y - A_y)^2}\]

Answer 6

this one is just super confusing cause it's a triangle.... That confused me @johnweldon1993

Answer 7

perimeter is the sum of the lengths all around
for a triangle sum all 3 lengths
use the above by @johnweldon1993 to find the lengths then add

Answer 8

to the nearest tenth means to 1 decimal place so calculate to 2 places before rounding

Answer 9

example name the triangle ABC
then you need to find the lengths AB, BC and CA
to find the length of AB you need the coordinates of A and the coordinates of B
use the formula (remember to take the square root) and get AB
do the same for the other 2 lengths
now add the 3 lengths