Solving for Unknown Angles

Warmup

You may use this applet to help you with the questions below. You can use the red slider and the (+) and (-) signs for moving the hands of the clock.

Activity #1

Finding the Unknown Portion of a Line Segment.

  • Use the line segment below to answer the questions that follow.

(2.) Explain your reasoning.

(4.) Explain your reasoning.

(6.) Explain your reasoning.

(8.) Explain your reasoning.

Activity #2

Angles between Intersecting Lines.

  • Study the diagrams below and answer the questions that follow.

(2.) Explain how you know they are a match.

(4.) Explain how you know they are a match.

(6.) Explain how you know they are a match.

(8.) Explain how you know they are a match.

(10.) Explain how you know they are a match.

Challenge #1

Find out what happens when the transversal(vertical line) swings left to right.

Challenge #2

Quiz Time

https://www.ixl.com/math/grade-7/find-measures-of-complementary-supplementary-vertical-and-adjacent-angles