Difference between revisions of "Surface area of a cone"
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=== Objectives === | === Objectives === | ||
| + | Understand surface area | ||
| + | |||
| + | To calculate surface area of a cone | ||
===Estimated Time=== | ===Estimated Time=== | ||
| Line 10: | Line 13: | ||
===Materials/ Resources needed=== | ===Materials/ Resources needed=== | ||
Digital: Laptop, geogebra file, projector and a pointer. | Digital: Laptop, geogebra file, projector and a pointer. | ||
| + | |||
| + | Geogebra file: {{Geogebra|tmj6wz7s}}{{Geogebra|utngknkp}} | ||
===Process (How to do the activity)=== | ===Process (How to do the activity)=== | ||
| − | + | The teacher after initial discussion on a cone and its properties can project the geogebra file and enable the understanding of derivation of formulae for surface area of a cone. | |
*Developmental Questions: | *Developmental Questions: | ||
#What is a solid shape ? | #What is a solid shape ? | ||
Revision as of 07:02, 29 May 2019
Objectives
Understand surface area
To calculate surface area of a cone
Estimated Time
40 minutes.
Prerequisites/Instructions, prior preparations, if any
Basics about cone, circle and pythogoras theorm should have been covered.
Materials/ Resources needed
Digital: Laptop, geogebra file, projector and a pointer.
Geogebra file:
Download this geogebra file from this link.
Download this geogebra file from this link.
Process (How to do the activity)
The teacher after initial discussion on a cone and its properties can project the geogebra file and enable the understanding of derivation of formulae for surface area of a cone.
- Developmental Questions:
- What is a solid shape ?
- Define a cone ?
- Give some examples of conical figures.
- Name the parts of a cone.
- What shape is its base.
- After disection can you identify the shapes it is made of ?
- Differentiate lateral surface area and total surface area.
- What is the formula to find the area of a circle ?
- Whatis the circumference of a circle ?
- Differentiate between the slant height and vertical height of a cone.
- How do we proceed to find the L.S.A. of the cone.
- How do we find the total surface area of the cone.
- Evaluation:
- What part of a circle is the lateral surface of a cone ?
- Question Corner:
- What would be the formula to find the surface area of an ice-cream cone.
- What is the frustum of a cone.