A rectangle has an area of 20 cm^2.  Its length and width are enlarged by scale factor 3.  Find the area of the enlarged rectangle.

Area Scale Factor = (Scale Factor)2

If the scale factor is 3 then:

ASF = 32

ASF = 9

Area of enlarged rectangle = 20x9

Area of enlarged rectangle = 180cm2

MU

Related Maths GCSE answers

All answers ▸

Simplify and then solve by factorisation 3x(x+2)-7=2, to find x.


There are N counters in a bag, 4 being red and the rest being blue. I take two counters at random from the bag (without replacing the first).The chance i take two blue counters is 1/3, See below in the answer box


Solve simultaneous equations x + y = 3 and -3x + 5y = 7


Factorise this quadratic = 8x^2 + 2x -3