π
∞
∑
∫
θ
E = mc²
y = mx+b
√
Δ
φ
∇
λ
About this video
The exterior angle of a triangle equals the sum of the two opposite interior angles — a handy shortcut in geometry problems.
What it covers
- What an exterior angle is
- Exterior angle = sum of the two interior opposite angles
- Using it to find unknowns quickly
