√ Square Root of 720 = 26.833
The square root of 720 is a value that when multiplied by itself gives 720. Learn 5 different methods to calculate √720 with step-by-step explanations.
What Is √720 and Why It Matters
The square root of 720 is 26.833 because 26.833 × 26.833 ≈ 720. 720 is not a perfect square, so its square root is an irrational number that continues forever without repeating. The simplified radical form is 12√5.
Understanding √720 helps build a strong foundation in algebra, geometry, and advanced mathematics. Whether you're a student learning square roots, a teacher preparing lessons, or a professional needing quick math references, this guide covers everything you need to know.
5 Ways to Calculate √720
Choose the method that works best for you, from simple mental math to advanced approximation techniques.
Mental Math (Multiplication)
Find the closest perfect squares: 26² = 676 and 27² = 729. Since 720 is between these, estimate around 26.833.
Prime Factorization
Prime factors: 720 = 2 × 2 × 2 × 2 × 3 × 3 × 5. Simplify: √720 = 12√5.
Long Division
Pair digits from right: 720 → 720. Continue with decimal pairs. Answer: 26.832816
Newton-Raphson (Iterative)
Formula: x₁ = (x₀ + n/x₀)/2. Starting with 26: iterations converge to 26.833.
Scientific Calculator
Press √, then 720, then = or Enter. Result: 26.832816.
Method Comparison
| Method | Best For | Result | Difficulty |
|---|---|---|---|
| Mental Math | Quick estimates | 26.833 | Easy |
| Prime Factorization | Simplifying radicals | 12√5 | Medium |
| Long Division | Exact decimals | 26.832816 | Hard |
| Newton-Raphson | Programming | 26.833 | Hard |
| Calculator | Everyday use | 26.832816 | Easy |
Real-World Uses of √720
Geometry & Area
A square with area 720 cm² has side length 26.833 cm. This is a classic example used in math classes worldwide.
Construction & Architecture
Builders and architects use √720 to calculate diagonal measurements, ensure right angles, and determine material quantities.
Statistics & Data Science
Standard deviation, variance, and other statistical measures frequently use square root calculations for data analysis.
Physics & Engineering
Square roots are essential in calculating velocity, acceleration, electrical resistance, and many scientific formulas.
Continue Your Learning Journey
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Frequently Asked Questions
Practice Problems
Final Thoughts
The square root of 720 is 26.833. Since 26.833 × 26.833 ≈ 720, this is an irrational number with infinite decimal places.
We've explored 5 different methods to calculate √720, from simple mental math to advanced iterative techniques. Each method offers a unique approach to understanding this fundamental mathematical concept.
"Mastering square roots opens the door to advanced mathematics and real-world problem solving."