164k views
3 votes
The measures of two of the sides of an equilateral triangle are 3x + 15 in. and 7x – 5 in. What is the measure of the third side in inches?

User Rebra
by
8.5k points

2 Answers

5 votes

Answer:

30

Explanation:

User Kare Nuorteva
by
8.0k points
5 votes

Answer: 30 in.


Explanation:

If it's an equilateral triangle, all sides are the same length. Therefore

3x + 15 = 7x - 5

x = 5

After figuring out x = 5, replace the x with five and solve the equation.

3(5) + 15 = 30

7(5) - 5 = 30

Now that we know the length of two sides, we can state that the third side-length also equals 30 inches because it is an equilateral triangle, meaning all sides are congruent/ the same.

User Anchit Mittal
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories