Which is a segment?, , , , Which is a ray?, , , , Which is this angle?, acute angle, obtuse angle, right angle, How many acute angles are there in this triangle?, 1, 2, 3, This is a obtuse angle., true, false, This is a straight angle., True, False, Less than 90 degree is an acute angle., True, False, 152 degree is an obtuse angle., True, False.

maths basic of geometry

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