P = 20cm
112 cm squared
If by length you mean diameter then the surface area is 80π cm squared= about 251.327cm squared
id say 10.000
10cm by 10cm (perimeter=40cm), 5cm by 20cm (perimeter=50cm), 50cm by 2cm (perimeter=104cm), 100cm by 1cm (perimeter=202cm). All of these rectangles' areas are 100cm2
If 20cm is the diameter then radius is 10cm and area = Pi * r2 = Pi * 100 = 314 to the nearest square centimetre.
Area = 20*10 = 200 square cm
The area of a 10cm circle is 314.16cm2 ( squared)
4200 !
20cm squared.
20cm squared
P = 20cm
200 sq. cm.
100 cm(2). (2) means squared
1 cm = .01m so were looking at 624 sq. m covered by blocks with area .01 sq. m. Divide 624 by .01 and you get 62400 tiles.
Simply add the numbers up For example, If the area of a semicirce is 20cm squared and the area of a rectange is 25cm squared, then the total area would be 20 + 25 = 45
112 cm squared