Are the ratios 1:2 and 6:3 equivalent?

No

Step-by-step explanation:

1:2

Multiply by 3 on each side

1*3 : 2*3

3:6

This is not the same as 6:3

3 apple:6 bananas is not the same as 6 apples: 3 bananas

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm