Posted by **Debbie** on Tuesday, November 30, 2010 at 9:26am.

If the sides of a triangle are in the ratio 3:4:5 and the perimeter of the triangle is 72 inches what are the lengths of the sides?

- geometry -
**bobpursley**, Tuesday, November 30, 2010 at 9:27am
3x+4x+5x=72

solve for x, then you have it.

- geometry -
**Debbie**, Tuesday, November 30, 2010 at 9:32am
Thank you! That was a fast answer! What if it was angles? The angles of a triangles have the ratio 3:4:5 - would you say that 3x + 4x + 5x = 180 and then solve for x?

- geometry -
**drwls**, Tuesday, November 30, 2010 at 9:38am
Yes, that would give you the angles, once you have solved for x, which is 15 degrees in this case.

- geometry -
**Debbie**, Tuesday, November 30, 2010 at 9:51am
Thank you so much!

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