Using Vertical and Adjacent Angles to Find Unknown Angle Measures

This video tutorial teaches how to find unknown angle measures using vertical and adjacent angles. It begins with a review of straight and supplementary angles, followed by an explanation of vertical and adjacent angles using a street intersection example. The tutorial demonstrates how to use known angles to solve for unknown angles in intersecting lines, emphasizing the properties of vertical angles. The lesson concludes with a summary of the key concepts covered.

What is the sum of supplementary angles?

• 45 degrees

• 90 degrees

• 180 degrees

• 360 degrees

If two streets intersect and one angle measures 85 degrees, what is the measure of its adjacent angle?

• 90 degrees

• 180 degrees

• 95 degrees

• 85 degrees

Which of the following is true about vertical angles?

• They share a side.

• They have different measures.

• They share a vertex but not a side.

• They are always 90 degrees.

If angle x is vertical to an angle measuring 95 degrees, what is the measure of angle x?

• 180 degrees

• 90 degrees

• 95 degrees

• 85 degrees

How can you determine the measure of angle y if it is vertical to an angle measuring 85 degrees?

• Angle y measures 90 degrees.

• Angle y measures 95 degrees.

• Angle y measures 85 degrees.

• Angle y measures 180 degrees.