Exploring Adding and Subtracting Rational Expressions

This video tutorial covers the basics of angles, including their formation, naming conventions, and types such as acute, obtuse, right, and straight angles. It provides examples of naming angles and classifying them based on their measurements. The tutorial also explains congruent angles, angle bisectors, perpendicular lines, and the angle addition postulate, with practical examples to enhance understanding.

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

• Arc

• Degree

• Vertex

• Side

How do you name an angle when there is only one angle at the vertex?

• Using four letters

• Using two letters

• Using a single letter

• Using three letters

Which type of angle is less than 90 degrees?

• Straight angle

• Acute angle

• Right angle

• Obtuse angle

What is the measure of a right angle?

• 45 degrees

• 180 degrees

• 90 degrees

• 120 degrees

What do you call angles that have the same measure?

• Adjacent angles

• Supplementary angles

• Complementary angles

• Congruent angles

What is an angle bisector?

• A ray that divides an angle into two congruent angles

• A line that is parallel to another line

• A line that intersects at a right angle

• A segment that connects two points

What is the symbol for perpendicular lines?

• An upside-down capital T

• A straight line

• A curved line

• A parallel line

How do you name the sides of an angle?

• From the vertex out

• From the endpoint in

• From the midpoint out

• From the base in

What does the angle addition postulate state?

• The measure of an angle is always less than 90 degrees

• The measure of an angle is always greater than 90 degrees

• The sum of the measures of two adjacent angles is equal to the measure of the larger angle

• The sum of the measures of two angles is always 180 degrees

If angle ABD is 48 degrees and angle DBC is 78 degrees, what is the measure of angle ABC?

• 110 degrees

• 120 degrees

• 130 degrees

• 126 degrees