Using scale factors 1 a) Here is a rectangle. Draw another rectangle where each side is twice as big. b) Here is a square. Draw another square where each side is 4 times as big. 2 a) Explain what it means for a shape to be enlarged by a scale factor of 2 b) Enlarge the shapes by a scale factor of 2 3 Complete the sentence. A shape in which each side has tripled in size has been enlarged by a scale factor of © White Rose Maths 2019
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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
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