Triangle jkl has vertices at the following coordinates: j(2, 2), k(-1, 3), and l(-2, -1). determine whether or not triangle jkl is a right triangle. show all calculations for full credit.

  not a right triangle

Step-by-step explanation:

A plot lets you see that the slope of CB is 4/1 and the slope of BA is -1/3. The product of these values is not -1, so the triangle is not a right triangle.

A graphing program can measure the angle to verify it is not 90°.

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)