\[ 4\pi r^2 = 144\pi \] - United Radiology

April 21, 2026 · United Radiology

["Solving 4πr² = 144π: Step-by-Step Guide to Find the Radius", "If you’re trying to solve the equation ( 4\pi r^2 = 144\pi ), you’re working with a fundamental formula in geometry — the surface area of a sphere. Understanding how to solve this equation not only helps with algebra but also applies directly to real-world physics, engineering, and mathematics. In this SEO-optimized article, we’ll walk through solving ( 4\pi r^2 = 144\pi ), explain the significance of the result, and explore practical applications of this formula.", "---", "### What is the Surface Area of a Sphere?", "The surface area ( A ) of a sphere is given by the formula:", "[
\nA = 4\pi r^2
\n]", "Where ( r ) represents the radius of the sphere. When you see ( 4\pi r^2 = 144\pi ), you’re solving for the radius ( r ) of a sphere whose surface area equals ( 144\pi ) square units.", "---", "### Step-by-Step Solution", "Start with the given equation:", "[
\n4\pi r^2 = 144\pi
\n]", "1. Divide both sides by ( 4\pi ):
\n To isolate ( r^2 ), divide both sides by ( 4\pi ):
\n [
\n r^2 = \frac{144\pi}{4\pi} = 36
\n ]", "2. Take the square root of both sides:
\n [
\n r = \sqrt{36} = 6
\n ]", "Since radius cannot be negative, we discard the negative root.", "---", "### Final Answer", "The radius ( r ) of the sphere satisfying ( 4\pi r^2 = 144\pi ) is:", "[
\n\boxed{6}
\n]", "---", "### Why This Equation Matters", "Solving ( 4\pi r^2 = \ ext{Area} ) is not only key to geometry but also vital in many scientific and practical contexts:", "- Physics: Surface area affects heat transfer, radiation, and reaction rates.
\n- Engineering: Used in designing spherical containers, pressure vessels, and components.
\n- Astronomy: Estimating surface areas helps calculate energy emission from stars.", "---", "### Understanding the Formula: Geometry Basics", "- The formula ( 4\pi r^2 ) comes from the integration of circular rings around the sphere’s axis.
\n- The factor ( 4\pi ) reflects the surface coverage independent of the radius.
\n- Setting ( 4\pi r^2 = 144\pi ) equates the sphere’s surface to a known area — a common task in modeling and measurement.", "---", "### Related Keywords for SEO Optimization", "Optimize this article for search engines by targeting these high-traffic keywords and phrases:", "- Solve ( 4\pi r^2 = 144\pi )
\n- Find radius from ( 4\pi r^2 )
\n- Surface area of sphere formula
\n- How to solve ( 4\pi r^2 = \ ext{value} )
\n- Sphere surface area calculator
\n- Geometry problems involving radius and area", "---", "### Real-World Application Example", "Suppose you’re designing a spherical water tank. You know the total surface area must be ( 144\pi ) square meters to meet construction specifications. After solving ( 4\pi r^2 = 144\pi ), you find ( r = 6 , \ ext{m} ), allowing accurate piping, material estimation, and structural planning.", "---", "### Conclusion", "Solving ( 4\pi r^2 = 144\pi ) is a straightforward yet essential task that reinforces core geometric understanding. By isolating the radius through clear algebraic steps, you unlock insights into spherical shapes and their applications across science and engineering. Whether you’re a student, teacher, or professional, mastering this equation empowers accurate measurements and confident problem-solving.", "---", "Meta Description for Search Engines:
\nLearn how to solve ( 4\pi r^2 = 144\pi ) step-by-step. Discover the sphere’s radius, surface area formula, and real-world applications in geometry and engineering. Perfect for students and math enthusiasts.", "---", "H2: Need More Algebra Help? Visit Our Tutorials Section
\nExplore fully explained math solutions, formulas, and application examples to build confidence and master geometry.", "---", "By combining clear explanations, mathematical rigor, and real-world relevance, this article serves both educational and SEO goals effectively."]

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