The circumference of a circle is the length around the circle which is equal to 360°. Pi Π is the number needed to compute the circumference of the circle.
p is equal to 3.14
To find the area of a circle, it is equal to 3.14 Π (p) times the radius (r) to the power of 2. The area of a circle formula looks like:
A= Π r2
Use the formulas given to answer the questions.
Previous knowledge needed include: understanding measurement units, understanding of diameter, circumference and radius as well as understanding how to apply a formula. Some familiarity using formulas to calculate perimeter and area of squares, rectangles, trapezoids, parrallelegrams and cylinders are all prerequisites to using these worksheets.
Although some teachers require students to memorize formulas. I do not think students need to memorize all the formulas given the amount of information required from students today, however, I think it's important to remember the value of the constant pi 3.14 (Even though Pi is 3.14159265358979323846264.... students should remember 3.14 and that it's infinite. Students should be able to determine what formula is needed and they should be able to look the forumula up if they haven't memorized it. There is great skill in being resourceful!
Once the worksheets have been completed, it is worth checking with the answer sheets or using a calculator to check the final answers.