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Mathematics 9 Online
OpenStudy (anonymous):

help

OpenStudy (anonymous):

OpenStudy (anonymous):

what is \(6\times 2.5\)?

OpenStudy (anonymous):

15

OpenStudy (anonymous):

ok and what is \(8\times 2.5\)?

OpenStudy (anonymous):

20

OpenStudy (anonymous):

|dw:1438178109944:dw|

OpenStudy (anonymous):

now find the perimeter

OpenStudy (anonymous):

how

OpenStudy (anonymous):

@satellite73

OpenStudy (anonymous):

see we were using a scale of 2.5 so 1cm = 2.5 so 6cm = 6 *2.5

OpenStudy (anonymous):

am i right @satellite73 ? :D

OpenStudy (anonymous):

15

OpenStudy (anonymous):

yes so now find the area

OpenStudy (anonymous):

how

OpenStudy (anonymous):

area = length * breadth

OpenStudy (anonymous):

15*20=300

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

perimeter = 2( l+b)

OpenStudy (anonymous):

what?

OpenStudy (anonymous):

yes 2 * ( length + breadth)

OpenStudy (anonymous):

add, not multiply

OpenStudy (anonymous):

\[15\times 20\]is the area, not the perimeter

OpenStudy (anonymous):

thats the formula or u cand add the four sides

OpenStudy (anonymous):

yes thats what i told him

OpenStudy (anonymous):

but which one is it? Perimeter = 38 cm, area = 300 cm2 Perimeter = 70 cm, area = 300 cm2

OpenStudy (anonymous):

@satellite73

OpenStudy (anonymous):

@satellite73

OpenStudy (anonymous):

15+15+20+20

OpenStudy (anonymous):

D!

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