What percentage is the shaded area

50%

Step-by-step explanation:

50% because it is halfways shaded

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)

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8