explaining on Instagram: "This diagram beautifully explains why the sum of all angles in a triangle is always 180° 📐✨ Each corner of the triangle is shown with different colors — green, blue, and red. When these three angles are placed together along a straight line (as shown at the top), they form a straight angle, which equals 180°. Geometrically, if you extend one side of the triangle and draw a line parallel to the opposite side, using the rules of alternate interior and corresponding angle

Triangular Prism | Definition, Structure & Examples

Terrific Triangle Quilt Tutorials: 40 Triangle Quilt Patterns