What is the common endpoint of two rays that form an angle called?

The common endpoint is called the vertex of the angle.

An acute angle measures between ___ and ___ degrees.

An acute angle measures greater than 0° but less than 90°.

If two angles are supplementary, what is the sum of their measures?

The sum of their measures is 180°.

Riddle: I am formed when two lines cross, my opposite angles are equal, what am I?

You are vertical angles.

Fill in the blank: A straight angle measures ___ degrees.

A straight angle measures 180 degrees.

What tool is used to measure angles?

A protractor is used to measure angles.

True or False: A reflex angle measures greater than 90° but less than 180°.

False. A reflex angle measures greater than 180° but less than 360°.

What type of angles are formed when two lines intersect and share a common vertex and side but do not overlap?

Adjacent angles are formed.

When a transversal intersects two parallel lines, which angles are equal and in the same relative position at each intersection?

Corresponding angles are equal.

What is the measure of each part if an angle measuring 80° is bisected?

Each part measures 40°.

Define an angle and explain how it is formed.

An angle is formed by two rays that share a common endpoint called the vertex. The two rays are referred to as the sides or arms of the angle.

What is the significance of the protractor in measuring angles?

Protractors measure angles accurately.

• Essential for geometry tasks.

• Helps in construction projects.

• Ensures accurate angle measurements.

Fill in the blank: An angle measuring exactly 90° is called a ___.

Right angle.

What do we call angles that add up to 180° and are adjacent to each other?

Linear pair.

Riddle: I can be sharp or wide, sometimes I'm just right. I measure turns and help you see shapes. What am I?

An angle.

How do you classify an angle measuring 135°?

A 135° angle is classified as an obtuse angle because it is greater than 90° but less than 180°.

True or False: Vertical angles formed by two intersecting lines are always different in measure.

False. Vertical angles are always equal in measure.

Calculate the measure of the angle that is the supplement of 110°.

The supplement of 110° is 70°, because supplementary angles add up to 180°. Thus, 180° - 110° = 70°.