Right Angled Triangle
Right angled triangle equations.
A right triangle  or a right angled triangle  is a triangle in which one of the angles is a right angle  a 90 degree angle.
The length of the hypotenuse of aright triangle can be calculated as
c = (a^{2} + b^{2})^{1/2} (1)
The other sides can be calculated as
a = (c^{2}  b^{2})^{1/2} (2)
b = (c^{2}  a^{2})^{1/2} (3)
The angle θ can be calculated as
θ = atan b/a
= arctan b/a
= tan^{1} b/a (4)
Example  Right Triangle
The length of the hypotenuse where a = 1.7 m and b = 1 m can be calculated as
c = ((1.7 m)^{2} + (1 m)^{2})^{1/2}
= 1.97 m
The angle θ can be calculated as
θ = atan ((1 m) / (1 m))
= 30.5^{o }
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