Answer:
1a + 3
Step-by-step explanation:
What's the perimeter of a triangle?
❖ The perimeter of a triangle is the distance around a triangle, or the
sum of all its side lengths.
How does it apply here?
❖ In this case, we're given the perimeter of the triangle as 3a + 11. We
also have two dimensions of the triangle: 2a and 8. Now, we need to
find the third side. To find the third side, we subtract 2a + 8 from 3a +
11.
Solving
Now, let's check if 1a + 3, 2a, and 8 add up to 3a + 11.
Therefore, the answer is 1a + 3.
Have a lovely rest of your day/night, and good luck with your assignments! ♡
