Geogebra 1 - Basics
- Author:
- Kinglok, Fong
Understanding centroid and circumcentre
Requirement
1. Draw two different triangles (let's say Triangle A and Triangle B) without intersecting each other.
2. Construct centroid on Triangle A and construct circumcentre on Triangle B.
3. Draw a circle with circumcentre as center and encloses the Triangle B.
4. Besides, You should also name the centroid and circumcentre with different color.
5. Add your name, class and class number on your work and submit the graph.
Marking
Total 10 (+2) Marks
1. Correct triangles : (1 M)
2. Centroid (lines through mid-point and vertex : 2 M, intersection : 1 M)
3. Circumcentre (perpendicular bisectors : 2 M, intersection and draw circumcircle : 1 M)
4. Circle encloses triangle (2 M)
5. Format : (1 M)
6. Bonus : (2 M)
Reference:
Definiton of Centroid:
http://en.wikipedia.org/wiki/Centroid
Definition of Circumcentre:
http://en.wikipedia.org/wiki/Circumcentre
Geogebra Tutorial 1 - Basis
https://www.youtube.com/watch?v=1cBXWi66-tY
Geogebra Tutorial 2 - Insert Text
https://www.youtube.com/watch?v=xLYvdgJ6fyg
Yahoo 知識:
http://hk.knowledge.yahoo.com/question/question?qid=7009052302073