SSS
Learning how to use Geogebra
Follow instructions to practice using the basic tools in Geogebra:
1. Construct a point using the "point" button.
2. Find the "line" button and create a line through point A.
3. Click on the reverse arrow button on the top right corner to undo what you just did. This is the undo button
4. Find the "polygon" button (looks like a triangle) and create a triangle starting from point A. Your triangle should be triangle ABC.
5. Click on the "Move" button (looks like a mouse cursor) and move the vertices of your triangle around.
Side Side Side Congruence Postulate
1. I created a triangle ABC with the given side lengths: 3, 6.2, and 6.9. Next to it are segments with equal lengths to one of each of the sides of the triangle.
2. Create a triangle with the given segments that is DIFFERENT from the original triangle. The rule is that the endpoints of each segment must be touching the endpoints of another segment.
Helpful Tip: The darker blue dot will allow you to drag the segments around, and the lighter blue dot will allow you to change the direction of the segment.
3. Is this possible?
If two triangles have three congruent sides, what must be true about them?
We call this the Side-Side-Side Congruence Postulate. In short, we will call it the SSS.