Calculate Triangle Perimeter: 3-4-5 Right Triangle Challenge

Question

Find the perimeter of the triangle ABC

00:06 Let's find the perimeter of the triangle. Ready?

00:10 To do this, we'll add up all the sides. The perimeter is the total of all three sides.

00:15 Now, we'll take each side length from our problem. Add them together, and that gives us the perimeter.

00:22 Great job! That's how we find the perimeter of a triangle.

To find the perimeter of triangle $\triangle ABC$ , we need to sum the lengths of its sides:

Using the formula for the perimeter of a triangle:

$\text{Perimeter} = AB + BC + CA$

Substitute the known values:

$\text{Perimeter} = 3 + 4 + 5$

$\text{Perimeter} = 12$

Thus, the perimeter of triangle $\triangle ABC$ is $\mathbf{12}$ .

From the multiple-choice options provided, the correct choice is option 1: 12.