Properties of Triangles

Which set of side lengths could NOT be used to form a triangle?

• 2 cm, 6 cm, 7 cm

• 7 cm, 15 cm, 8 cm

• 5 cm, 5 cm, 5 cm

• 8 cm, 9 cm, 6 cm

What is the missing angle measure in the triangle?

• 24°

• 34°

• 44°

• 46°

Which shows the side lengths of the triangle in order from greatest length to least length?

• AB, BC, AC

• AC, BC, AB

• BC, AC, AB

• AC, AB, BC

Which of the following shows the relationship among the side lengths of the triangle?

• p < l < c

• l < c < p

• c < p < l

• p < c < l

Two sides of a triangle have measures of 6 inches and 12 inches. Which measure could be the length of the third side?

• 5 in

• 6 in

• 10 in

• 18 in

Which set of side lengths could be used to form a triangle?

• 4 ft, 5 ft, 9 ft

• 8 ft, 6 ft, 15 ft

• 12 ft, 2 ft, 10 ft

• 5 ft, 8 ft, 12 ft

Which of the following shows the relationship among the angle measures of the triangle?

• m∠X < m∠O < m∠V

• m∠O < m∠X < m∠V

• m∠O < m∠V < m∠X

• m∠V < m∠X < m∠O

Mario is designing a logo for the drama club. The logo is a triangle with a 100° angle and a 40° angle. What is the measure of the third angle of the logo?

• 60°

• 50°

• 40°

• 30°

Brooke drew a triangle. One side of the triangle is 6 centimeters long. Another side of the triangle is 11 centimeters long. Which could be the length of the third side of the triangle?

• 3 centimeters

• 5 centimeters

• 12 centimeters

• 17 centimeters

Elm Street, Third Street, and Maple Avenue intersect to form a triangle. What is the measure of the angle formed by Third Street and Maple Avenue?

• 30°

• 40°

• 45°

• 75°