What is a Sphere?
A sphere is a three-dimensional shape that is perfectly round, like a ball. It is defined as the set of all points in space that are a given distance (the radius) away from a given point (the center).
Characteristics of a Sphere
Here are some key characteristics of a sphere:
- Surface Area: The surface area of a sphere is given by the formula: A = 4πr2, where r is the radius of the sphere.
- Volume: The volume of a sphere is given by the formula: V = (4/3)πr3, where r is the radius of the sphere.
- Diameter: The diameter of a sphere is the distance across the sphere passing through the center. It is twice the radius: d = 2r.
Real-life Examples
Spheres can be found in many real-life objects, such as balls, planets, and bubbles. Their perfectly round shape makes them ideal for minimizing surface area and maximizing volume, which is why they are commonly used in various applications.
.◂Math Worksheets and Study Guides Third Grade. Adding Money
Study Guide
Adding Money 
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Adding Money Worksheet/Answer key
Adding Money Worksheet/Answer key
Adding Money Worksheet/Answer key
Adding Money
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The resources above cover the following skills:
Algebra (NCTM)
Use mathematical models to represent and understand quantitative relationships.
Model problem situations with objects and use representations such as graphs, tables, and equations to draw conclusions.