Year 7 : 7.B Program for students who have achieved some Stage 3 Outcomes
UNIT 18 - COMPASS & RULER CONSTRUCTIONS
Teacher :
Class :
Time: 1½ weeks: Term 4 Wks 9, 10
Date Commenced:
4.3 additional Outcomes
Constructs angles, polygons, parallel lines
using ruler and a pair of compasses
Students’
Achievement
Some
Most All
Key Ideas
Initial
&
Date
Construct angles, parallel lines, bisect
angles, bisect intervals. Construct regular
polygons.
Knowledge and Skills
Working Mathematically
Students learn about
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using a pair of compasses to bisect:
 a given interval
 a given angle
using a pair of compasses to construct
angles of 30º, 60º, 90º, 120º
using a pair of compasses and a ruler
to construct a perpendicular to a line:
 at a point on the line
 from a point not on the line
using a ruler and compasses to
construct triangles given three side
lengths
using compasses, ruler and protractor
to construct triangles given angle and
side measure
using ruler, compasses and protractor
to construct quadrilaterals and other
polygons given appropriate angle and
side measure
using compasses and protractor to
construct regular polygons inscribed
in a circle
using compasses to construct
congruent angles
using compasses and ruler to construct
a pair of parallel lines
   
   
   
   
   
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Evaluation comments :
Students learn to
bisect an angle by applying geometrical
properties
eg constructing a rhombus (Applying
Strategies)
bisect an interval by applying geometrical
properties
eg constructing a rhombus (Applying
Strategies)
draw a perpendicular to a line from a point
on the line by applying geometrical
properties eg constructing an isosceles
triangle (Applying Strategies)
draw a perpendicular to a line from a point
off the line by applying geometrical
properties eg constructing a rhombus
(Applying Strategies)
use ruler and compasses to construct angles
of 60º and 120º by applying geometrical
properties eg constructing an equilateral
triangle (Applying Strategies)
inscribe squares, equilateral triangles,
regular hexagons and regular octagons in
circles (Applying Strategies)
explain the difference between regular and
irregular shapes (Communicating)
construct a pair of perpendicular lines using
a ruler and a protractor, a ruler and a set
square, or a ruler and a pair of compasses
(Applying Strategies)
Other comments :
Was this the correct placement of the topic ?
Was the time allocation appropriate ?
Were the activities chosen appropriate ?
Students who may not have achieved some of the Outcomes in this Unit:
South Grafton High School
Year 7 B program
1
Date completed :
South Grafton High School
Time taken :
Teacher signature :
Year 7 B program
Supervisor Signature :
2