Question

(4 points)
7th Grade Math Formula Sheet

Use 3.14 for π
and do not round each answer.

Diameter =
units

Circumference =
units

Radius =
units

Area =
square units

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Answer 1

Sure! Here's a summary of the circle formulas using \( \pi \) as 3.14:

### Diameter
- The diameter (d) is twice the radius (r).
\[
d = 2r
\]
- **Unit**: units

### Circumference
- The circumference (C) of a circle is calculated using the formula:
\[
C = \pi d
\]
or
\[
C = 2\pi r
\]
- **Unit**: units

### Radius
- The radius (r) is half of the diameter (d):
\[
r = \frac{d}{2}
\]
- **Unit**: units

### Area
- The area (A) of a circle is given by:
\[
A = \pi r^2
\]
- **Unit**: square units

You can substitute values for the diameter or radius into these formulas to calculate the corresponding circumference and area.