find the the value of angle by in a
triangle if the respective angles are to
2y , 2y + 1 and 3 Y + 4
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Acute angle: Measures between 0° and 90°.
Right angle: Exactly equal to 90°.
Obtuse angle: Angle greater than 90° but less than 360°.
Reflex angle: Angle greater than 180° but less than 360°.
Two angles whose sum is 90° are called complementary angles.
Two angles whose sum is 180° are called supplementary angles.
Adjacent angles, linear pair of angles and vertically opposite angles are other important topics in this chapter.
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