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!

## Answer this Question

## Related Questions

- geometry - if the lengths of the sides of one triangle are 2 inches 5 inches and...
- Geometry - The lengths of the sides of a triangle are 3,5, and 7 inches. How ...
- geometry - The sum of the lengths of the sides of triangle ABC is 25 in. The ...
- Geometry - Two triangles are similar. The lengths of the sides of the smaller ...
- math - triangle a and b are similar the ratio of a side of triangle b to a ...
- Geometry - Triangle I has sides with lengths 2 2/3 cm, 4 1/2 cm and 3 cm. ...
- Geometry - The lengths of the sides of a triangle are 6 cm, 7 cm and 9 cm. In a...
- algebra - A triangle has side lengths of 5 inches, 12 inches, and 15 inches. ...
- math - The ratio of the corresponding sides of two similar triangles is 3:2. The...
- geometry - A wall pennant is in the shape of an isosceles triangle. Each of the ...