Using scale factors

1 a)Hereisarectangle.

Drawanotherrectanglewhereeachsideistwiceasbig.

b) Hereisasquare.

Drawanothersquarewhereeachsideis4timesasbig.

2 a) Explainwhatitmeansforashapetobeenlargedbyascale

factorof2

b) Enlargetheshapesbyascalefactorof2

3 Completethesentence.

Ashapeinwhicheachsidehastripledinsizehasbeenenlargedby

ascalefactorof

©WhiteRoseMaths2019

4 Hereisarectangle.

a) Measurethesidelengthsoftherectangleandlabelthemon

thediagram.

b) Enlargetherectanglebyascalefactorof3andlabelthe

sidelengths.

5 Thesidesoftherectangleareincreasedbyascalefactorof2

Whatistheperimeterofthenewshape?

cm

©WhiteRoseMaths2019

6 Theshapehasbeenenlargedbyascalefactorof112

Fillinthedimensionsofthenewshape.

7 TriangleAhasbeenenlargedbyascalefactorof5tomaketriangleB.

Findtheperimeterofeachtriangle.

perimeterofA= perimeterofB=

1cm

1cm

15cm

8cm

10cm

cm

cm

cm

14km

A

B75km