What is the perimeter of a triangle with sides measuring 4 inches, 7 inches, and 8 inches?

To find the perimeter of a triangle, you simply add the lengths of all three sides together. In this case, the sides of the triangle measure 4 inches, 7 inches, and 8 inches.

Calculating the perimeter involves the following steps:

1. Add the length of the first side (4 inches) to the length of the second side (7 inches):

(4 + 7 = 11) inches.

2. Next, add the length of the third side (8 inches) to the sum from the previous step:

(11 + 8 = 19) inches.

Thus, the perimeter of the triangle is 19 inches. This matches with the first choice, making it the correct answer.

Understanding this process is crucial: the perimeter can be found through straightforward addition of the side lengths. Any errors in this calculation can lead to incorrect conclusions, so ensuring each side is included in the sum is key to arriving at the correct perimeter.