Answer:
87.92
Step-by-step explanation:
3.14(a²+ab)=
<em>Plugging in values for a and b</em>
3.14(4²+4×3)=
3.14(16+12)=
3.14(28)=
87.92
A) to find the difference you have to subtract one from the other (53-(-41)=91)
b) 15
Angle B is 45, angle A is 108, angle C is 27
