Round 472.529996081 to the nearest ten

472.529996081 rounded to the nearest ten is 470

472.529996081 rounded to the nearest tenth is 472.5

Explanation:

The value in the tens place is 7. The digit just after that is 2, which is not 5 or greater. So we just replace everything after the 7 with 0's. A number like 470.00 is the same as 470. You can think of it as saying "470 is closer to 472, compared to the distance from 480 to 472".

Similarly, the value in the tenths place is 5, and the digit after this is not 5 or greater. So we replace these digits with 0. A number like 472.50 is the same as 472.5

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true