Classify each triangle by its angles and sides.

Classify each triangle by its angles and sides.

Find the measures of the sides of $$\Delta$$  DEF, then classify it by its sides.

D(8, -6), E(-1, -3), F(-2, 5)

**Use the Distance Formula on the left side.

If $$\Delta$$  JKL is an equilateral triangle, JK = 13x + 5, KL = 17x – 19, and JL = 8x + 35, what is the measurement of $$\overline{KL}$$   ?

$$\Delta$$  CDE is an isosceles triangle with CD $$\cong$$  DE . If CD = 9x – 25, DE = 6x + 8, and CE = 10x – 73, find the measurement of $$\overline{CE}$$  .