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A Trapezium and its properties (view source)
Revision as of 07:28, 29 October 2019
, 07:28, 29 October 2019added Category:Quadrilaterals using HotCat
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=== Learning objectives ===
# A quadrangle with only two opposite sides parallel is called a trapezium, or trapezoid.
# The parallel sides are called the bases of the trapezium and the other two sides are called the legs or the lateral sides.
===Learning objectives===
# If the legs are equal in length, then this is an isosceles trapezium.
# The distance between the bases is called height of trapezium.
===Notes for teachers===
===Notes for teachers===
===Activity No # ===
===Activity No # 1. Properties 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://karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
|}
|}
*Estimated Time
*Estimated Time :40 minutes.
*Materials/ Resources needed
*Materials/ Resources needed:
Laptop, geogebra file, projector and a pointer.
*Prerequisites/Instructions, if any
*Prerequisites/Instructions, if any
# Knowledge about parallel lines, angles and diagnols.
*Multimedia resources: Laptop.
*Website interactives/ links/ / Geogebra Applets: This file has been taken from www.geogebratube.org
<span> </span>
*Multimedia resources
*Website interactives/ links/ / Geogebra Applets
<span></span><div id="ggbContainer597bb1446b162898fe083f13cfdcd040"></div><span></span>
*Process:
# Show the geogebra file and explain its properties by asking the questions listed below.
*Developmental Questions:
# What is a trapezium ?
# How many sides does it have ?
# What can be said about the pair of sides ?
# Identify the diagnols. Are they equal ?
# What would be the sum of 4 angles of the trapezium ? Why so ?
# What would be the sum of its two allied angles ?
# Are the two pairs of sides of a trapezium equal ?
*Evaluation:
Are the students able to apply the theorems of parallel lines - transversal to prove the properties.
# Why are allied angles of the trapezium supplementary ?
# Are the diagnols equal ?
# Is trapezium a parallelogram ?
*Question Corner:
# List the properties of a trapezium.
# What properties of other quadrilaterals does it share. Compare with other quadrilaterals.
[[Category:Quadrilaterals]]