Answer:
elimination
Step-by-step explanation:
You need to eliminate numbers from the equation until it is solved.
2008
end year using 4 digits
Answer:
a=21° b=70°
Step-by-step explanation:
a=21°(Vertically Opposite Angles)
b+110°=180° (linear pair)
b=180-110
b=70°
[please mark me brainliest]
Answer:
3 cm
Step-by-step explanation:
So the area of the total circle is:

If you remove the outer band you have the area of the inner circle

This means that the inner circle had an area of
area = pi * r^2
9 pi = pi * r^2
r =

So the radius of the inner circle is 3.