An angle of 27 degrees is an acute angle
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Complement angle of 27 degrees is (90-27) = 63 degrees
sec(27) = 1.1223, approx.
A 90 degree angle is a right angle
A 45-degree angle is an acute angle
If the triangle has a 30 degree angle and a 60 degree angle then the 3rd angle must be a 90 degree angle because there are 180 degrees in a triangle and so therefore it is a right angle triangle.