Triangles and Angles

In triangle XYZ, line XY measures 2 in., line YZ measures 4 in., and line XZ measures 3 in. Which lists the angles of the triangle in order from smallest angle to largest angle?

• ∠X, ∠Y, ∠Z

• ∠Y, ∠Z, ∠X

• ∠Z, ∠X, ∠Y

• ∠Z, ∠Y, ∠X

Which could be the side lengths of an isosceles triangle?

• 2 inches

  2 inches

  5 inches

• 2 inches

  3 inches

  4 inches

• 2 inches

  3 inches

  3 inches

• 3 inches

  3 inches

  6 inches

In triangle LMN, angle L measures 40°, Angle M measures 60°, and angle N measures 80°. Which lists the sides of the triangle in order from shortest length to longest length?

• LM, LN, MN

• LN, LM, MN

• MN, LM. LN

• MN, LN, LM

A right triangle has an angle that measures 35°. Which is the measure of another angle in the triangle?

• 35°

• 55°

• 100°

• 145°

A triangle has one obtuse angle and one acute angle. Which could be the measure of the third angle?

• 80°

• 90°

• 100°

• 110°

A triangle has side lengths of 2 cm, 8 cm, and x cm. Which measure could be the value of x in centimeters?

• 6

• 9

• 10

• 12

• 13

• 15

• 17

• 19

• 40°

• 60°

• 120°

• 140°

• 45°

• 81°

• 87°

• 99°

• 15°

• 50°

• 55°

• 60°