Geometry
posted by Tracy .
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! :)

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 
m angles mnp=23 degrees
Respond to this Question
Similar Questions

geometry
can one tell if two triangles are congruent if they are given only the angles and all of them are congruent to one another? 
Geometry
Find x if m<UKL = 13x4, m<JKL = 20x+12, and m<JKU = 72 
geometry
I have triangle XYZ with BX as the bisector sides XY and XZ are congruent. I have to write a proof for angle Y being congruent to angle Z. This is what I have, but it doesn't seem correct  can anyone help? 
Geometry
Write a two column proof. Given: angle STV is congruent to angle TVU, angle STU is congruent to angle UVS. Prove: Angle SVT is congruent to angle UTV. 
Geometry
answer to a two column proof problem such as Given: angle 1 and angle 5 are congruent and angle 5 is congruent to angle 4 prove angle 3 is comgruent to angle 1 
Geometry
PQR is congruent to DJE. complete the statement below PR is congruent to __, DJ is congruent to __ angle E is congruent to __ 1) PR is congruent to PQ, DJ is congruent to PQ, angle E is congruent to angle R 2) PR is congruent to DE, … 
Geometry
Write a two column proof. Given: angle STV is congruent to angle TVU, angle STU is congruent to angle UVS. Prove: Angle SVT is congruent to angle UTV. 
Geometry
Line MN is perpendicular to line NP. Point R is in the interior of the angle MNP. If angle MNR = 5x+12 and angle PNR =6x+23. Find both angle measures 
Geometry
Given: Line segment AD bisects angle BAC. Angle 1 is congruent to angle 3. Prove: Angle 2 is congruent to angle 3 Write a twocolumn proof 
Math
In a right triangle JKL, angle KJL measures 60 degrees. When drawn, the angle bisectors of angle JKL and LJK intersect at point M. What is the obtuse angle JMK