Lines and Transversals
- Author:
- Olivia, GeoGebra Team
- Topic:
- Algebra, Calculus, Functions, Geometry, Probability, Statistics
Part 1: Intro to Geogebra Tools
Part 2: Constructing Parallel Lines & a Transversal
Step 1: Click the line tool 
and click in two spots horizontally to create a line.
Step 2: Click the Parallel Line tool
. Now click somewhere below point A to make a point, and then click on your original line. You should now see 2 parallel lines.
Step 3: Put a 2nd point on your 2nd line by clicking the point tool 
and then clicking your 2nd line somewhere below point B.
Step 4: Make a transversal: Click the line tool and click somewhere below your 2 parallel lines, and somewhere above your 2 parallel lines, making a transversal.
Step 5: Click the Intersect tool 
. Now click on the 2 points where the transversal crosses the parallel lines. This should create 2 point where the 2 intersections are. If you don't get it exactly, click undo and try again.
Step 6: Use the angle tool 
to measure all 8 angles formed by the transversal crossing the parallel lines. To measure each angle ,you must click (in order) on the 3 points that form it.
and click in two spots horizontally to create a line.
Step 2: Click the Parallel Line tool. Now click somewhere below point A to make a point, and then click on your original line. You should now see 2 parallel lines.
Step 3: Put a 2nd point on your 2nd line by clicking the point tool and then clicking your 2nd line somewhere below point B.
Step 4: Make a transversal: Click the line tool and click somewhere below your 2 parallel lines, and somewhere above your 2 parallel lines, making a transversal.
Step 5: Click the Intersect tool . Now click on the 2 points where the transversal crosses the parallel lines. This should create 2 point where the 2 intersections are. If you don't get it exactly, click undo and try again.
Step 6: Use the angle tool to measure all 8 angles formed by the transversal crossing the parallel lines. To measure each angle ,you must click (in order) on the 3 points that form it.Fill in the missing information on your paper.
There are 8 total angles that were formed above. Let's name them like this:
Now fill in the missing information in the table.
Now fill in the missing information in the table.