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→Concept # 4. Scale drawing
==Concept # 4. Scale drawing==
==Concept # 4. Scale drawing==
===Learning objectives===
===Learning objectives===
# The process of representing actual distances on paper using proportional distances is called a scale.
# A Scale drawing is a drawing that shows a real object with accurate sizes except they have all been reduced or enlarged by a certain amount (called the scale).
# A Scale drawing is a drawing that shows a real object with accurate sizes except they have all been reduced or enlarged by a certain amount (called the scale).
# Since it is not always possible to draw on paper the actual size of real-life objects such as the real size of a car, an airplane, we need scale drawings to represent the size.
# Since it is not always possible to draw on paper the actual size of real-life objects such as the real size of a car, an airplane, we need scale drawings to represent the size.
# 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 # 1. Representing distances on paper-Introduction to scale drawing ===
===Activity No # 1.(Part A): 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;">
# Discuss the applications of scale drawing ?
# Discuss the applications of scale drawing ?
===Activity No # 2. Estimating Tile costs===
===Activity No # (PART B) : Estimating Tile costs===
{| 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;">
# The students should have knowledge about scale drawing.
# The students should have knowledge about scale drawing.
# They should know about scale factor.
# They should know about scale factor.
# They should understand that a scaling factor should be maintaining as constant throughout the sketches.
# They should understand that a scaling factor should be maintained as constant throughout the sketches.
# Students should be able to read and understand a scaling factor.
# Students should be able to read and understand a scaling factor.
# They should be able to find a scaling factor and create a scale drawing.
# They should be able to find a scaling factor and create a scale drawing.
# The activity on using standard measuring instruments should be done prior to this activity.
# The activity on using standard measuring instruments should be done prior to this activity.
# The students should have been introduced to area, calculations and unit conversions.
*Multimedia resources
*Multimedia resources
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets