there are 360 degrees of angle in a circle, when it reads 1/360th of the circumference is 0.58 cm, it is informing you that 1 degree equals 0.58 cm.
The question then becomes, how many 0.58 cm there are in 87 cm. This is a division problem, therefore 87 cm divided by 0.58 cm equals 150, which we would translate to 150 degrees.The ratio of the second one's arc to circumference will be the same as the ratio of its angle to the circle's total 360 degrees. This is equivalent to 334.6 cm / 504 cm = x / 360 in mathematics. The result of solving for x is 239 degrees.
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