Homework Help: 9th grade math

Posted by Greg on Friday, February 18, 2011 at 11:12pm.

the triange is 31cm, side 1 and side 2 have equal lenghts, while side 3 is one centimeter shorter than twice then length of side 1, how long is each side?

9th grade math - drwls, Saturday, February 19, 2011 at 7:34am
What part of the triangle is 31 cm? The perimeter? Side 3?
9th grade math - Aravind, Wednesday, February 23, 2011 at 11:43am
3rd side= 2x 1st side(shorter)
1st side=2nd side
2x+2x=31
4x=31
x=31/4=7.75

3rd side= 2*x-1
2*7.75-1= 14.5

1st side and 2nd side= 14.5
3rd side=2cm

Ans. 14.5cm, 14.5cm, 2cm

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