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From Karnataka Open Educational Resources
A Trapezium and its properties (view source)
Revision as of 10:44, 17 December 2013
, 10:44, 17 December 2013→Concept # 3.Construction of Trapezium
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*Estimated Time
*Estimated Time: 40 minutes.
*Materials/ Resources needed
*Materials/ Resources needed: a ruler, pencil, compass, and a blank piece of paper
*Prerequisites/Instructions, if any
*Prerequisites/Instructions, if any
*Multimedia resources
*Multimedia resources
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
*Process/ Developmental Questions
*Process:
# This construction can be made if the height of the trapezium along with the length of the four sides is known.
# Draw a straight line lightly using your ruler and pencil on your paper. - This is what we call a construction line, and will be the base of your trapezoid.
# Indicate the two end points of the base of your shape with two points, measured by your ruler.<br>
Note:We know that the top and base line of your trapezoid are parallel, and, we know the distance between them (the height of your shape).
# Using your compass, construct two lines (lightly) perpendicular to your base. On both of these lines measure the height of your trapezoid, and indicate with two points (one on each perpendicular) Connect these two points using a light construction line. The second side of your trapezoid will be 'somewhere' on this line.
# Using your ruler, measure the length of your third and fourth sides between these two paralell lines, using the points on your first construction line, as one end of the line segment. Mark with a point.<br>
Note: You will now have four construction lines, intersecting at four vertices.
# Your trapezium is the shape contained between the four points of intersection of these four lines.
# Using a heavier line connect the four points to finish your shape.
*Developmental Questions:
*Evaluation
*Evaluation
*Question Corner
*Question Corner
