So based on place values, the One's place is occupied by 4. To round to this digit, you go one number to the right. If that number is 5 or higher, you add one to 4. If it is less than 5, you don't add any to 4. Since 7 is greater than 5, you add 1 to 4, giving you 5, since you can now remove all the other numbers to the right.
5.
A F is 309. 16 + 5 + 30 = 51. 360 - 51 = 309
Hope this helped :D
The third angle is 60 degrees. A triangle has 180 degrees so 180-30-90=60
Step-by-step explanation:
maybe you can try to measure each of the ways maybe and you can get the equation
