Tina describes four triangles as shown below: Triangle A: All sides have length 12 cm
Triangle B: Two sides have length 10 cm, and the included angle measures 60º
Triangle C: Base has length 15 cm, and base angles measure 40º
Triangle D: All angles measure 60º
Which triangle is NOT a unique triangle?

Which pair of angles are vertical angles? ∠1 and ∠4 ∠1 and ∠2 ∠2 and ∠4 ∠2 and ∠3

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.