It is convenient to know the radian measure for benchmark angles such as 0°, 30°, 45°, and so on. Complete the table by finding the radian measure for each given benchmark. Enter all fractions as reduced fractions.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

21, i'm pretty sure it's right lol