Question

What is the approximate circumference of a circle that has a radius of 10 centimeters? (Use 3.14 for ). C=__ cm​

Answer 1

62.8

Explanation:

Radius is 10, so the diameter is 20 (10x2)

20 x 3.14(pi)= 62.8

Answer 2

C = 62.8 cm

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Geometry

• Circumference Formula: C = 2πr

Explanation:

Step 1: Define

r = 10 cm

Step 2: Find C

1. Substitute [CF]: C = 2π(10 cm)
2. Multiply: C = 20π cm
3. Multiply: C = 62.8 cm