Question

Use two lines of notebook paper as parallel lines and draw any

transversal. Use a protractor to measure

Measure one pair of same side interior angles. Repeat the experiment with another transversal. What appears to be true?

Short answer

It appears to be true that sum of measures of same side interior angles in both cases are$180°$

Step-by-step solution

Step 1. Draw the diagram

Draw two parallel lines and two transversal lines as shown in the figure.

Step 2. State the definition

Same-side interior angles: These are the two interior angles which are on the same sides of the transversal

Step 3. Use the protractor

Use protractor to measure of the same side interior angles in both cases. The sum of measures of same side interior angles in both cases are $180°$

Hence,$\angle 1+\angle 2=180°$