Question

The perimeter of a triangle is 40. If two of the sides are 15 and 10, write an equation. whats the equation

Answer 1

To find the perimeter of a triangle, you can use the formula:

\[
\text{Perimeter} = \text{Side}_1 + \text{Side}_2 + \text{Side}_3
\]

In this case, you have:

- Side 1 = 15
- Side 2 = 10
- Side 3 = \(x\) (the unknown side)

We know that the perimeter is 40, so we can write the equation:

\[
15 + 10 + x = 40
\]

Now, simplify the equation:

\[
25 + x = 40
\]

To isolate \(x\), subtract 25 from both sides:

\[
x = 40 - 25
\]

\[
x = 15
\]

So, the equation you are looking for is:

\[
15 + 10 + x = 40
\]

And the third side \(x\) is equal to 15.