Sum of interior angles of triangle is two right angles

Sum of interior angles of triangle is two right angles. . . Exterior angle of triangle is equal to the sum of interior opposite angles: https://youtu.be/01tLo4qmyXY

---~~~--- Please watch: "If 𝒙^𝒂.𝒙^𝒃=(𝒙^𝒂 )^𝒃, show that 𝒂/𝒃+𝒃/𝒂=𝒂𝒃−𝟐." https://www.youtube.com/watch?v=rZcUcisuYSc ---~~~--- Follow us: Facebook: https://facebook.com/mathswitharjun Twitter: https://twitter.com/twitajr ... https://www.youtube.com/watch?v=1SnPhx1_RjE