# Optical Illusion: Are they parallel?

## Analyzing Hering's Optical Illusion

In order to determine if the lines are parallel, we want to show that a pair of corresponding angles are congruent. Step 1: Identify a pair of corresponding angles to measure Step 2: Find the measurement of the angles using the angle measure tool in the tool bar. It is located next to the arrow. ﻿*Click on the angle measure in the toolbar (the angle measure tool will show up again so click on it) ﻿*Then, click on the three letters in the same order you would name the angle. ﻿*If the angle measure is not the interior angle, undo and change the order in which you are selecting points) Step 3: Click on the arrow in the toolbar, then select A to move the transversal and analyze what happens to the corresponding angles.

## What did you do???

Choose the appropriate conditional statement for correct order of the activity above.

Select all that apply
• A
• B

2.) Look at the conditional statements above, what is the relationship between the two.

Select all that apply
• A
• B
• C
• D