Area of a triangle (1) - stphilipneriprimary.org€¦ · 5 Draw a triangle that has 2an area of...
Transcript of Area of a triangle (1) - stphilipneriprimary.org€¦ · 5 Draw a triangle that has 2an area of...
1 Completethesentencestodescribe
thetriangle.
Thetrianglehas fullsquares.
Thetrianglehas halfsquares.
Theareaofthetriangle
is cm2
2 Countsquarestoworkouttheareaofeachtriangle.
a) c)
b)
3 Countsquarestoestimatetheareaofeachtriangle.
a) c)
b)
Whyareyouranswersestimates?
4 a)Workouttheareasoftheshapesbycountingsquares.
b) Whatdoyounoticeaboutyouranswerstoparta)?
Explorethisusingotherrectangles.
c) Writeyourfindings.
Areaofa triangle (1)
©WhiteRoseMaths2019
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5 Drawatrianglethathasanareaofapproximately15cm2
Compareanswerswithapartner.
6
DoyouagreewithEva’sestimate?
Talkaboutitwithapartner.
7 Drawtriangleswiththeseareas.
1cm22cm23cm24cm25cm26cm2
Talktoapartneraboutthebeststrategiesfordrawingthetriangles.
Areaofa triangle (1)
©WhiteRoseMaths2019
1cm
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I estimate the size of the triangle to be about 16 cm2
3 Countsquarestoestimatetheareaofeachtriangle.
a) c)
b)
Whyareyouranswersestimates?
4 a)Workouttheareasoftheshapesbycountingsquares.
b) Whatdoyounoticeaboutyouranswerstoparta)?
Explorethisusingotherrectangles.
c) Writeyourfindings.
1cm
1cm
1cm
1cm
1cm
1cm
1cm
1cm
1cm
1cm