10 POINTS Please help directions are at the top of the picture, please leave just a lil explanation also I’ll mark brainliest. :)

C, F, D

Step-by-step explanation:

For each side of each triangle, think of the side as the hypotenuse of a right triangle. Then use the Pythagorean theorem to find the length of the hypotenuse, which is the side of the triangle.

Left problem:

From point C to point A, go 2 left and 7 up.

From point A to point B, go 5 right and 1 down.

From point B to point C, go 6 down and 3 left.

Perimeter = 7.3 + 5.1 + 6.7 = 19.1

Do the same for the other triangles.

Middle problem:

From point F to point D, go 2 left and 7 up.

From point D to point E, go 7 right and 2 down.

From point E to point F, go 5 down and 5 left.

Perimeter = 7.3 + 7.3 + 7.1 = 21.7

Right problem:

From point L to point J, go 7 left and 1 up.

From point J to point K, go 4 up and 5 right.

From point K to point L, go 2 right and 5 down.

Perimeter = 7.1 + 6.4 + 5.4 = 18.9

i think it would be 42cm