A triangle is graphed in the coordinate plane. The vertices of the triangle have coordinates (-3, 1), (1, 1), and (1, -2). What is the perimeter of the triangle?

A. 6
B. 7
C. 12
D. 14

Question

A triangle is graphed in the coordinate plane. The vertices of the triangle have coordinates (-3, 1), (1, 1), and (1, -2). What is the perimeter of the triangle?

A. 6
B. 7
C. 12
D. 14

anonymous · Answer

@Jesstho.-.

anonymous · Answer

You can see two lengths of the triangle, and use Pythagorean Theorem to find the other length. Then, add all sides for perimeter.

anonymous · Answer

I think B

anonymous · Answer

I was thinking 7 too. Thanks! :D

anonymous · Answer

B is incorrect.

anonymous · Answer

Oh

anonymous · Answer

Look at the picture. 1 side is 4 units, and one side is 3 units. The triangle in the picture is a right one, so, use Pythagorean Theorem to find the other length(hypotenuse). Ask me if you need more help with Pythagorean Theorem.

anonymous · Answer

Can you walk me through it? I can't remember how to do it.

anonymous · Answer

Pythagorean Theorem: $$a ^{2}+b ^{2}=c ^{2}$$$$a ^{2}=9$$$$b ^{2}=16$$$$16+9=25$$$$\sqrt{25}=5$$So:
a=3
b=4
and c, the missing value=5

Now, add all the sides.
3+4+5=12

anonymous · Answer

Oh okay! Thank you so so SO much!!

anonymous · Answer

Your welcome.