The regular nonagon will have 9 congruent isosceles triangles each with two equal sides of 13.1571198cm and two equal angles of 70 degrees with a base of 9cm opposite apex angle of 40 degrees.
Area of triangle: 0.5*13.1571198^2 *sin(40)*9 = 500.7277596 square cm
if you have a picture you could count around the square
1 Inch equals 2.54cm, so 81cm would do 31.89 inches
2.657 feet.
The circumference = 2 x r x pi If your diamter is 81cm then your circumference is 254.5cm If your radius is 81cm then your circumference is 508.9cm
Approximately 12.73cm
it is 81cm
if you have a picture you could count around the square
If the area of a square is 81, then the length of a side is 9. Add up the length of all four sides to get the perimeter: 9 + 9 + 9 + 9
1 Inch equals 2.54cm, so 81cm would do 31.89 inches
2.657 feet.
The circumference = 2 x r x pi If your diamter is 81cm then your circumference is 254.5cm If your radius is 81cm then your circumference is 508.9cm
Approximately 12.73cm
cc
cm is length, ml is cm3 which is 3 dimensional. you cannot compare length with volume
im not too sure if im average but i jumped 70cm from a standstill and 81cm with a running start
1200 + 1500 + 81 + 65 = 2846 cm = 28 m, 46 cm
69 cm x 51 cm = 27.16 inches x 20.08 inches