📐
Triangle
★☆☆☆☆Elementary
📖Definition
A polygon with three sides. The sum of interior angles is always 180°.
📐Formulas
∠ A + ∠ B + ∠ C = 180°
Sum of interior angles
a + b > c
Triangle inequality (sum of any two sides > third side)
✏️Examples
예제 1★☆☆☆☆
If two angles of a triangle are 50° and 70°, find the third.
예제 2★★☆☆☆
Can a triangle have sides of length 3, 4, and 8?
⚡Applications
Architecture
Truss structures
Surveying
Triangulation
🔗Related Documents
→Prerequisites
↔Related
⚡Applications
#geometry#triangle#fundamental