If two parallel lines are cut by a transversal, which of the following pairs are always supplementary?

Two construction workers are setting up two ladders of equal length against two walls at different angles. One ladder is positioned at a steeper angle than the other. What can be said about the height each ladder reaches on the wall?

True or False. If one angle of a triangle is 120°, then the other two angles must be smaller than 120°.

True or False. The exterior angle of a triangle is always smaller than one of the opposite interior angles.

A construction worker is designing a triangular frame for a roof. The lengths of two sides are 5 meters and 8 meters. Which of the following could be the possible length of the third side?

IDENTIFICATION. Which of the following best describes two or more lines that are always the same distance apart and never cross?

True or False. When opening a pair of scissors, the distance between the tips of the blades increases as the angle between the blades increases.

True or False. The sum of the two shorter sides of a triangle must always be greater than the longest side.

Which of the following is not possible for the sides of a triangle?

What does the Same-Side Interior Angles Theorem state?

Problem Solving. Find the measure of ∠𝑆𝑀𝑅.

True or False. In an isosceles triangle theorem, If two sides of a triangle are congruent, then the angles opposite those sides are congruent.

The Triangle Inequality Theorem states that the sum of the lengths of any two sides of a triangle must be__.