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From Karnataka Open Educational Resources
→Activity No # Introduction to scale drawing
# Drawing to scale is a tool that Engineers use for many different tasks. One key part of every scale drawing is the scaling factor. This number represents the degree to which our scale drawing or scale model has been reduced in size when compared to the original.
# Drawing to scale is a tool that Engineers use for many different tasks. One key part of every scale drawing is the scaling factor. This number represents the degree to which our scale drawing or scale model has been reduced in size when compared to the original.
===Notes for teachers===
===Notes for teachers===
===Activity No # Introduction to scale drawing ===
===Activity No # Representing distances on paper-Introduction to scale drawing ===
{| 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;">
# Scale, pencil, graph paper.
# Scale, pencil, graph paper.
*Prerequisites/Instructions, if any
*Prerequisites/Instructions, if any
# The students should have skill of measuring and tabulating accurately.
# They should have prior knowledge of ratio and proportions.
# They should have good calculating abilities.
*Multimedia resources
*Multimedia resources
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
# Ask them how will they go about it so that the distances are represented proportionately.
# Ask them how will they go about it so that the distances are represented proportionately.
# The teacher can then elicit from the students that a proper equivalent unit has to be used for the purpose.
# The teacher can then elicit from the students that a proper equivalent unit has to be used for the purpose.
# Ater this activity she can spell out the term scale and discuss about the blue print of ahouse, mapping, model constructions and so on.
# After this activity she can spell out the term scale and discuss about the blue print of a house, mapping distances, atlas maps, model constructions and so on.
#
# This activity can be done to introduce the students to the concept of scale drawing.
*Developmental Questions
*Developmental Questions
# What did you measure ?
# What did you measure ?
# Were the students able to comprehend which measuring instrument should be used for particular items ?
# Were the students able to comprehend which measuring instrument should be used for particular items ?
# Were they able to document their observations appropriately in a tabular form.
# Were they able to document their observations appropriately in a tabular form.
*Question Corner
*Question Corner:
# Discuss the applications of scale drawing ?
===Activity No # Estimating Tile costs===
===Activity No # Estimating Tile costs===
