What is the circumference and area of a circle with a radius of 4 meters? Round your answer to the nearest tenth.
Okay so for these two questions you need to know the formula of the circumference and area of circle before attempting the question.
Circumference of Circle = 2*pi*r (where 'r' is the radius of the circle)
Area of Circle = pi*r^2 (pr*r*r, where 'r' again is the radius of the circle).
So with regards to your question now:
Circumference = 2*pi*4 = 8*pi = 25.1327 = 25.1m (rounded to the nearest tenth) (Don't forget the unit of measure 'meters' in this case)
Area = pi*(4)^2 = 16*pi = 50.2655 = 50.3 m^2 (rounded to the nearest tenth)