Question

The legs of an isosceles triangle have lengths x + 1 and -x + 7. The base has length 3x - 3. What is the length of the base?

A. 4
B. 6
C. 3
D. cannot be determined

Answer 1

The legs are congruent if is an isoceles triangle.

Answer 2

So you set it equal to each other to find x.
After you did that, plug the x into the base length 3x-3

Answer 3

@Shalante I'm confused.. Can you explain more? I don't really understand Geometry that well..

Answer 4

@RoseDryer can you help with this question?

Answer 5

Do you know what congruent means?

Answer 6

Yes @Shalante

Answer 7

Whenever an isoceles triangle is congruent, its leg are the same in length.
Since the legs have lengths x+1 and -x+7. You must make them equal to each other by solving for x.
After you solve for x, plug that x back to the base, since the base relies on the x to figure out its length.

Answer 8

How do I solve for x? @Shalante

Answer 9

Set them equal to each other x+1=-x+7.
Know this?
It is from Algebra 1

Answer 10

Yes, but I barely remember it. What number do I subtract from each side? @Shalante

Answer 11

make the x into one side, so you add x to the left side and the right side.

Answer 12

But there's already an x on the left and right side? @Shalante and i dont have a lot of time left to finish my exam..

Answer 13

Hello? @Shalante