# Difference between revisions of "Cyclic quadrilateral"

• Estimated Time 10 minutes
• Materials/ Resources needed: Laptop, geogebra file, projector and a pointer.
• Prerequisites/Instructions, if any
1. Circle and quadrilaterals should have been introduced.
• Multimedia resources : Laptop
• Website interactives/ links/ / Geogebra Applets

• Process:
1. The teacher can recall the concept of a circle, quadrilateral, circumcircle.
2. Can explain a cyclic quadrilateral and show the geogebra applet.
3. Move points, the vertices of the quadrilateral and let the students observe the sum of opposite interior angles.
```Developmental Questions:
```
1. What two figures do you see in the figure ?
2. Name the vertices of the quadrilateral.
3. Where are all the 4 vertices situated ?
4. Name the opposite interior angles of the quadrilateral.
5. What do you observe about them.
• Evaluation:
1. Compare the cyclic quadrilateral to circumcircle.
• Question Corner
1. Can all quadrilaterals be cyclic ?
2. What are the necessary conditions for a quadrilateral to be cyclic ?

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