Question

What is the perimeter of triangle ABC? Round to the nearest tenth.



A.
5.8 units

B.
10.8 units

C.
13.8 units

D.
8.8 units

Answer 1

@Mehek14

Answer 2

I think it is fairly easy to calculate the distance from point A to point B and from Point B to Point C. But the distance from Point A to Point C, can be a bit difficult because it would require for you to use the Pythagorean Theorem: \(a^2 + b^2 = c^2\)

Answer 3

and how do we do that?

Answer 4

Hello?

Answer 5

@thesmartone

Answer 6

Now we do
\(a^2 + b^2 = c^2\)
\(3^2 + 5^2 = c^2\)
\(34 = c^2\)
\(\sqrt{34} = c\)

Perimeter = 3 + 5 + \(\sqrt{34}\)

Answer 7

In your calculator you need to evaluate what \(\sqrt{34}\) is equal to and then add it to \(3 + 5\). Then round to the nearest tenth.