In this figure, 𝒍||𝒎. Jessie listed the first two steps in a proof that ∠𝟏 + ∠𝟐 + ∠𝟑 = 𝟏𝟖𝟎°. Which justification can Jessie give for Steps 1 and 2? #28

The vertices of the triangle in the diagram below are A(7,9), B(3,3), and C(11,3). What are the coordinates of the center of ABC? #22

Triangle ABC has vertices A(0,0), B(3,2), and C(0,4). The triangle may be classified as #34

What is true about △ABC? Select three options. #31

Two sides of a triangle are 5 feet and 8 feet. Select all of the possible lengths of the third side. #28

What would be the reason for the final step? #15

Find the equation of the median line, from vertex A to the opposite side, $$\overline{BC}.$$  

A(9, 5), B(2, 5), C(4, 1) #32

Two sides of a triangle have the following measures. Find the range of possible measures for the third side. $$8,12$$   #17

Which of the following sets of lengths can NOT form a triangle? #21

Two sides of a triangle are 5 feet and 8 feet. Select all of the possible lengths of the third side. #28

Determine if the two triangles are congruent. If they are, state the postulate.