The perimeter would be 8 + 9 + 10 = 27cm
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So?
If you're talking about a five sided figure, just add up your figures.
No because the 3 sides of an equilateral triangle are equal in length
The area of a rectangle of sides 9cm and 10cm is:9cm x 10cm = 90cm2This is equivalent to 0.009m2
Dimensions are given out as length by width 14cm by 1cm 13cm by 2cm 12cm by 3cm 11cm by 4cm 10cm by 5cm 9cm by 6cm 8cm by 7cm And the rest is all repeats of the above.