Posted by **Tracy** on Wednesday, January 28, 2009 at 11:31pm.

Angle JKL is congruent to angle MNP, KL= 21x - 2, NP = 20x, LJ = 15x, PM = 13x + 4. Find LJ.

I don't understand how to do it! Please, help! :)

- Geometry -
**drwls**, Thursday, January 29, 2009 at 1:25am
Because the two triangles are congruent, the following pairs of side lengths are equal: JK = MN, KL = NP and LJ = PM

The last two relationships tell you that

21x - 2 = 20x, and 15x = 13x + 4

Both of those equations tell you that x = 2. (The gave you more information than you need to solve the problem!)

Since x = 2, LJ = 4

- Geometry -
**kayla**, Tuesday, January 4, 2011 at 11:12pm
m angles mnp=23 degrees

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