Write the name of the period that has the digits 486 in 751,486

ones.

Explanation:

1) The group of the first three digits (those most to the right) of a number belong the period of the ones.

2) The second grup of three digits (tho the left of the first group) belong to the of the thousands.

3) The next group of three digist to the left belong to the period of the millions.

4) The next three form the group of the billions.

5) The other three are the trillions.

6) Therefore, for the given number 751,486, the digits 486 are in the period of the ones, and the digits 721 are in the period of the thousands.

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer