Write the number 0.21212121 ... as a fraction

1.91/9

Step-by-step explanation:

x=0.212121212                                                         1  equation

10x=2.12121212                                                       2   equation

1 equation - 2 equation

9x=1.91

x=1.91/9

therefore 0.212121=1.91/9

10010010001010010101001001010010100101010010101010010010101010110010001011010010010001

step-by-step explanation:

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2