Mathematical triangle knowledge There is an angle of 30 ° in a right triangle. What's the relationship between the three sides

Mathematical triangle knowledge There is an angle of 30 ° in a right triangle. What's the relationship between the three sides

The right side of the 30 ° angle is half of the hypotenuse
A 60 ° angle is three times the root of a 30 ° angle
The right angle side of 30 ° angle: the right angle side of 60 ° angle: the hypotenuse = 1 ∶ 3 ∶ 2