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How to Construct Supplementary Angles in GeoGebra
You can easily create and display supplementary angles using GeoGebra.
GeoGebra Instruction 1
Adjacent Supplementary Angles
- 1.
- Open
Graphics Viewunder
Viewin
Menu. - 2.
- Select
Line
and draw a line in Graphics View. You should also get two points on your line named and . - 3.
- Select
Point on Object
and draw a point that is between and . This point will get the name . - 4.
- Select
Point
and draw a point outside of the line from the previous step. This point will get the name . - 5.
- Select
Angle
and click , and ,
in that order. Repeat for the points
, and .
- 6.
- Select
Move
and drag point around. You’ll see that the sum of the two angles you drew is always °.
GeoGebra Instruction 2
Nonadjacent Supplementary Angles
- 1.
- Open
Graphics Viewunder Viewin Menu. - 2.
- Select
Line. Click two points in the plane in Graphics View, but be sure to click the leftmost point first. You should get a line with two points named and , where is the leftmost point of the two. - 3.
- Select
Point and draw a point above the line from the previous step. This point will be given the name . - 4.
- Select
Segment
and click and . - 5.
- Select
Parallel line
and click point , then the line segment you drew in the previous step. - 6.
- Select
Perpendicular Line
and click point , then the parallel line you drew in the previous step. - 7.
- Select
Intersect
and click the lines from Steps 5 and 6. This point should get the name . - 8.
- Select
Angle and click the points , , and ,
in that order. After the angle is drawn, click the points
, , and ,
in that order.
- 9.
- Select
Move and drag point around while making sure it’s always above the line. You’ll see that the sum of the two angles you drew is always °.
