Saskatchewan Common Mathematics Assessments
Post Assessment
Outcome: SS7.2 Develop and apply formulas for determining the area of
triangles, parallelograms, and circles.
1. Find the area of the following irregular shapes.
Level
3
(a) ________
1m
5m
2m
8m
3
(b) ________
2. Find the area of the following parallelogram.
________
Level
3
3. Calculate the area correct to two decimal places.
________
3
4. Calculate the shaded area correct to one decimal place.
________
Level
3
5. Calculate the shaded area, correct to two decimal places.
________
4
6. Construct your own composite shape with an area of 20 cm2.
Label the lengths of the sides.
Level
4
Teacher Section
Teacher Notes: Calculator
Question
Indicator
Level
Answer Key:
1. a
SS6.2 f
3
A = (1 x 5) + (8 x 2) = 21 square metres
1. b
SS7.2 h
3
A = ½(2)(5) + 5(1) = 10 square metres
2.
SS7.2 d,h
3
A = B x h = 6.5 x 2.5 = 16.25 square centimetres
3.
SS7.2 g,h
3
A = 3.14 x r x r = 3.14 x 27 x 27= 3.14 x 729 = 2289.06 square centimetres
4.
SS7.2 g,h
3
A = (3.14 x r x r )/4 = 50.24 square centimetres
5.
SS7.2 b,g, h
4
A = (3.14 x r x r) – ( ½ x B x h)= 54.5 square centimetres
6.
SS7.2 h
4
Student answers may vary. One possible answer is a composite shape that
consists of a parallelogram with a base of 5 cm and height of 2 cm connected
to a triangle with a base of 5 cm and height of 4 cm.
Answer
Outcome: SS7.2 Develop and apply formulas for determining the area of triangles,
parallelograms, and circles.
Description of
Levels:
(based on
Marzano, 2007)
Indicators and
Learning
Targets for each
Level:
Student-friendly
descriptions of
learning targets.
up to Level 1
There is a partial
understanding of
some of the
simpler details
and processes.
Prior knowledge
is understood.
Calculate the
area of a
rectangle by
using a formula.
Identify a
parallelogram,
triangle and
circle.
Understand area
is written as
square units.
I can calculate
the area of a
rectangle by
using a formula
written as square
units.
up to Level 2
No major errors
or omissions
regarding the
simpler details or
processes, but
major errors or
omissions
regarding the
complex
processes may be
present.
SS7.2 a,c,e
Explain how the
area of a
rectangle can be
used to find the
area of a triangle
and
parallelogram.
Estimate the area
of a circle.
up to Level 3
No major errors
or omissions
regarding any of
the information
and/or processes
that were
explicitly taught.
This is the
target level for
proficiency.
up to Level 4
In addition to level
3 performance, indepth inferences
and applications
go beyond what
was explicitly
taught.
SS7.2 b,d,g
Determine and
apply the
formula for the
area of a triangle,
parallelogram
and circle.
SS7.2 h
Solve problems
involving the area
of a triangle,
parallelogram and
circle.
I can explain
how the area of a
rectangle can be
used to find the
area of a triangle
and
parallelogram
and estimate the
area of a circle.
I can calculate
the area of a
triangle,
parallelogram
and a circle by
using a formula.
I can solve simple
and complex
problems
involving the area
of a triangle,
parallelogram and
circle.