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A Trapezium and its properties (view source)
Revision as of 15:50, 17 December 2013
, 15:50, 17 December 2013→Activity No # !.Area of a trapezium
*Question Corner
*Question Corner
===Activity No # !.Area of a trapezium===
===Activity No # 1.Area of a trapezium===
{| style="height:10px; float:right; align:center;"
{| style="height:10px; float:right; align:center;"
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
|}
|}
*Estimated Time
*Estimated Time: 20 minutes.
*Materials/ Resources needed
*Materials/ Resources needed : Laptop, geogebra file, projector and a pointer.
*Prerequisites/Instructions, if any
*Prerequisites/Instructions, if any
*Multimedia resources
# The students should know a parallelogram and formula to find its area.
# They should know the trapezium and its properties.
*Multimedia resources: Laptop
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
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*Process/ Developmental Questions
*Process:
*Evaluation
# The teacher can initially discuss about a trapezium.
*Question Corner
# She can then reiterate that formula for area of certain composite figures can be found by converting them into known simple figures.
# Here the trapezium is converted into a parallelogram.
# Area of parallelogram is then deduced.
*Developmental Questions:
# What is a trapezium ?
# Name its two parallel sides.
# What is meant by the height of the trapezium ?
# After cutting the trapezium exactly in the centre what would be the new height ?
# What is the length of the new parallelogram formed ?
# What is the formula to find the area of a parallelogram ?
# What is the area of this parallelogram formed from a trapezium ?
*Evaluation:
# Explain the sequence of steps involved in deriving the formula for the area of a trapeium.
*Question Corner:
# Recall the steps involved in deriving the formula for area of a parallelogram.
==Concept # 3.Construction of Trapezium==
==Concept # 3.Construction of Trapezium==