Deriving formula for area of a kite

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• Estimated Time : 30 minutes.
• Materials/ Resources needed: Laptop, geogebra file, projector and a pointer.
• Prerequisites/Instructions, if any
1. Basics of a triangle and kite should have been done.
• Multimedia resources: Laptop
• Website interactives/ links/ / Geogebra Applets
• Process:
1. The teacher can project the geogebra file on kite.
2. Show them that a kite is made of two isosceles traingles.
3. Sum of areas of these two triangles would be the area of the kite.
• Developmental Questions
1. What is a kite ?
2. What are the properties of a kite.
3. What other figures can you see in a kite ?
4. What types of triangles are these ?
5. Identify the two isosceles triangles ?
6. What is the formula to find the area of a triangle ?
• Evaluation:
1. Choosing which two traingles out of the 8 visible types would be easy to deduce the area of kite ?
• Question Corner:
1. Recall the two formulae that you know to find the area of a triangle.