4. Perimeter and Area

4.01 Pythagoras' theorem

4.02 Calculating perimeter

4.03 Circumference of circles and sectors

4.035 Scale factor

4.04 Lengths of similar figures

4.05 Area of shapes

4.06 Area of circles and sectors

4.07 Area of composite shapes

4.08 Perimeter of land

Year 11

4.035 Scale factor

Interactive practice questions

Consider the following quadrilaterals.

Quadrilateral $ABCD$ABCD is given with the measures of its sides. Side $AB$AB is $3$3 units, side $BC$BC is $3$3 units, side $CD$CD is $4$4 units, and side $AD$AD is $6$6 units. Quadrilateral $A'B'C'D'$A′B′C′D′ is also given with the measure of its sides. Side $A'B'$A′B′ is $9$9 units, side $B'C'$B′C′ is $9$9 units, side $C'D'$C′D′ is $12$12 units, and side $A'D'$A′D′ is $18$18 units.

a

Is quadrilateral A'B'C'D' an enlargement of quadrilateral ABCD?

Yes

A

No

B

b

What is the scale factor?

Easy

< 1min

Consider the following quadrilaterals.

Easy

< 1min

Which unit do we use to express the scale factor?

Easy

< 1min

Glass in the shape of a circle has a radius of $12$12 centimetres. When it is blown, the radius becomes $48$48 centimetres. What is the enlargement factor?

Easy

< 1min

Outcomes

MS11-4

performs calculations in relation to two-dimensional and three-dimensional figures

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