Respuesta :

Answer:

21cm

Step-by-step explanation:

you first look at the circle

next you see the numbers in the circle

after that you multiply the numbers together

so, 3x7= 21cm

ashleescoot
Answer:125.67cm^2

Explanation: area of a circle= πr^2

So the entire circle:
π(7)^2
=153.94

But the smaller circle is in the inside so we minus the area of that from the whole circles area.

Smaller circle area:
π(3)^2
=28.27

Therefore are of the blue shaded area:
=153.94-28.27
=125.67