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?

8 answers

3x+4x+5x=72
solve for x, then you have it.
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?
Yes, that would give you the angles, once you have solved for x, which is 15 degrees in this case.
Thank you so much!
If the sides of a triangle are in the ratio 3:4:5 and the perimeter of the triangle is 72 inches what is the longest length of the triangle?
The answer is ----------
X=6
X=6 for the one with 72cm and the
one for 180 cm is X=15
The sides of a scalene triangle are 6cm, 9cm and 13cm respectively. Find the area and perimeter of the triangle.