Wendy described four triangles as shown below:
triangle a: all sides have length 9 cm.
triangle b: two sides have length 10 cm, and the included angle measures 60°. triangle c: two angles measure 50°.
triangle d: base has length 8 cm, and base angles measure 45°.

which triangle is not a unique triangle?

When angles are the only specification, one side can be any length you want. The triangle is not uniquely specified by its angles.

The appropriate choice is ...

... Triangle C: Two angles measure 50°.

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → d