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4 years ago

Find the area (7cm, 20cm, 11 cm, 14 cm

Mathematics

2 answers:

Likurg_2 [28]4 years ago

8 0

ok ... so the way i solved this is by finding the correct side measurements ... so in this there are 2 rectangles ... so lets find the area of both rectangles individually and then add it together ... so the rectangle on the top will be a and the down one will be b

rectangle a :

as we know ... a rectangle has opposite sides equal . the side on the right is 20 ... subtract it from 11 ... if we do that we get 9 ... which is the length of rectangle a and as the top is 7 bottom will be 7 too

now we know the sides of rectangle a which is 7 and 9

and area of rectangle : l × b , ∴ 7×9= 63

now b ... sides of rectangle b are 14 and 11

so 14×11= 154

now add it ... 154 + 63 = 217

∴ = 217 sq.

LenKa [72]4 years ago

3 0

A = 7*9 +11*14
=63 + 154
=217 cm^2

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3 years ago

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Then for any scaling factor x the dimensions of rectangle B will be:

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Dimension of rectangle B = x * (9 inches by 3 inches)

Dimensions of rectangle B = 9x inches by 3x inches

For more understanding let we assume that rectangle B is scaled copy of rectangle A by scaling factor x=3; then we will have the dimensions of rectangle B as under:

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3 years ago

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