Estimates the difference between 486,983 and 83,496

If you just want an estimate, what first comes to mind is 486,000 - 83,000 which would be 403,000. You could go for a simpler estimate like 480,000 - 80,000 which gives you 400,000

Step-by-step explanation:

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)