Answer:
1.C= (3.14 (pi) x 2) x r (radius)
3.14 x 2 = 6.28 x 7 (radius) = 43.96 cm is the circumference
2. C= 3.14 (pi) x d (diameter)
3.14 x 9 = 28.26 inches is the circumference
3. C= (3.14 x 2) x r
3.14 x 2 = 6.28 x 12 = 75.36 mm is the circumference
4. C= 3.14 x d
3.14 x 15 = 47.1 cm is the circumference
5. C= 3.14 x r
3.14 x 3.5 = 10.99 m is the circumference
Step-by-step explanation:
Finding the Circumference of a circle
There are 2 formulas to use when finding the circumference of a circle:
Formula to use when diameter is given:
C=3.14 (pi) x d or diameter
3.14(constant value for pi) multiplied by d or diameter equals the circumference
Formula to use when radius is given:
C= (3.14 (pi) x 2) x r or radius
3.14 multiplied by 2 = N multiplied by r or the radius = Circumference
Things to Remember:
3.14 is the constant value of pi
C stands for Circumference
d stands for diameter
r stands for radius
Good luck answering!
#CarryOnLearning
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Answers & Comments
Answer:
1.C= (3.14 (pi) x 2) x r (radius)
3.14 x 2 = 6.28 x 7 (radius) = 43.96 cm is the circumference
2. C= 3.14 (pi) x d (diameter)
3.14 x 9 = 28.26 inches is the circumference
3. C= (3.14 x 2) x r
3.14 x 2 = 6.28 x 12 = 75.36 mm is the circumference
4. C= 3.14 x d
3.14 x 15 = 47.1 cm is the circumference
5. C= 3.14 x r
3.14 x 3.5 = 10.99 m is the circumference
Step-by-step explanation:
Finding the Circumference of a circle
There are 2 formulas to use when finding the circumference of a circle:
Formula to use when diameter is given:
C=3.14 (pi) x d or diameter
3.14(constant value for pi) multiplied by d or diameter equals the circumference
Formula to use when radius is given:
C= (3.14 (pi) x 2) x r or radius
3.14 multiplied by 2 = N multiplied by r or the radius = Circumference
Things to Remember:
3.14 is the constant value of pi
C stands for Circumference
d stands for diameter
r stands for radius
Good luck answering!
#CarryOnLearning