right angle triangle 直角三角形
right-angle triangle method 直角三角形法
right angle spherical triangle 球面直角三角形
right-angle plane triangle 平面直角三角形
An equilateral triangle has all sides equal and all angles equal. A right triangle has one Angle equal to 90 degrees.
等边三角形三边相等三内角相等。直角三角形有一个角等于90度。
For example the square on hypotenuse of a right Angle triangle is equal to the sum of the squares of the other two sides.
例如，直角三角形斜边的平方，等于其它两边的平方和。
A right triangle has a right Angle.
直角三角形有一个角是直角。
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