Скачать или смотреть Class 7 Math |Ch-7 A TALE OF THREE INTERSECTING LINES| Figure it Our | Page 154-156

Ever been given three side lengths and wondered if they can actually form a triangle? 📏 Spoiler alert: the answer is often NO! In this video, we break down the super simple but powerful rule that lets you know for sure in just 5 seconds.

Forget trying to draw it out. We're diving into the Triangle Inequality Theorem, a fancy name for a really easy idea. We'll show you the "official" way to check, and then we'll reveal the genius shortcut that saves you time and makes you look like a math wizard. This is a must-know concept for geometry, standardized tests (like the SAT, ACT, GCSE), and anyone who loves a good math hack!

WHAT YOU'LL LEARN IN THIS VIDEO: 📌

The Core Problem: Why you can't form a triangle with side lengths like (3, 4, 8).

The Full Rule (The "Long" Way): Understanding the basic idea that any two sides of a triangle must add up to be longer than the third side. We'll test it on a few examples.

THE ULTIMATE SHORTCUT: The one simple check that is all you need. Hint: It involves finding the longest side first! We explain why you can ignore the other two checks.

Visual Proof 💡: We'll use the circle method shown in the textbook to give you an "aha!" moment and prove visually why this shortcut works every single time.

After this video, you'll be able to instantly tell if three lengths can form a triangle. Drop a comment below with three lengths and test your friends!

Thanks for watching, and don't forget to subscribe for more math tricks explained simply!

TIMESTAMPS:
0:00 - The Impossible Triangle Problem
1:15 - The Official Triangle Inequality Theorem
3:02 - The One-Check Shortcut REVEALED!
4:45 - Why The Shortcut Works (The Circle Proof)
6:20 - Quick-Fire Examples

HASHTAGS:
#TriangleInequality #Geometry #MathTricks #MathHelp #LearnMath #HighSchoolMath #SATPrep #GCSEMaths #MathExplained