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An angle that is greater than 90 degrees but less than 180 degrees is called?
A. An acute angle
B. An obtuse angle
C. A right angle
D. A reflex angle
Correct Answer Is Option = An obtuse angle
Notes / Explanation
An angle that is greater than ninety degrees but less than one hundred and eighty degrees is called an obtuse angle, and this is one of the important kinds of angles studied in the branch of mathematics that deals with shapes, known as geometry. An angle is formed where two lines meet, and it is a measure of the amount of turning between the two lines, measured in units called degrees. Angles are classified into different kinds according to their size. An angle of exactly ninety degrees, which is the angle found at the corner of a square, is called a right angle. An angle that is less than ninety degrees, that is, smaller than a right angle, is called an acute angle, so that acute angles are the small, sharp angles. An angle that is greater than ninety degrees but less than one hundred and eighty degrees is called an obtuse angle, so that obtuse angles are the larger, blunter angles, wider than a right angle but not so wide as to form a straight line. An angle of exactly one hundred and eighty degrees, which forms a straight line, is called a straight angle. Thus the obtuse angle is the kind of angle that is greater than a right angle but less than a straight angle, being a wide, blunt angle. Understanding the different kinds of angles and being able to recognise them is a basic and important part of the study of geometry, for angles are involved in the study of shapes, in measurement, in construction and design, and in many other areas. The recognition of an obtuse angle as one greater than a right angle but less than a straight angle, an acute angle as one less than a right angle, and a right angle as one of exactly ninety degrees, is fundamental. Angles are found everywhere in shapes and structures, and the ability to classify and measure them is useful in mathematics and in many practical fields. For PPSC and other competitive examinations, the key points to remember are that an angle that is greater than ninety degrees but less than one hundred and eighty degrees is called an obtuse angle, that an angle is a measure of the turning between two lines, measured in degrees, that a right angle is exactly ninety degrees and an acute angle is less than ninety degrees, and that an angle of exactly one hundred and eighty degrees, forming a straight line, is called a straight angle.
