Question

What is the triangles' perimeter

Answer 1

If there is a zero in the hundredths place, A, B, and C cannot be correct, as they have a one, seven, and seven in the hundredths place.  Thus, D is the answer, as it has a zero in the hundredths place.

Answer 2

To find the perimeter of any shape, you find the sum of their side lengths.

In this case, this triangle has side lengths of 1.197, 0.764, and 1.74.
Add these, and the sum is your answer.

1.197 + 0.764 + 1.74 = 3.701

Therefore 3.701 is the correct answer :)