it is called a 30 60 90 and the sides are proportionally equal to 1,2,sq rtof3
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A right triangle with a hypotenuse of 12cm and an angle 30 degrees has an opposite angle of: 60 degrees.
A right-angle triangle
It is a right angle triangle and the 3rd angle will measure 30 degrees
It is a right angle triangle providing that the 3rd angle is 30 degrees.
The third angle is 90 degrees so it is right angle triangle.