Over a 90* angle is an obtuse angle. Less then a 90* angle is acute. Hope this helped :)
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The smaller angle is 20 degrees and the larger is 70 degrees. Complementary angles total 90 degrees. Let's call the smaller angle A. The other angle is 3A + 10. The sum of both angles is 90, so 4A +10 = 90, 4A = 80, A = 20. The larger angle is 3(20) + 10 = 70.
A bigger than 180 degrees angle
an obtuse angle
a reflex angle.
It is an acute angle that is greater than 0 but less than 90 degrees.