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Acute Angles measure between 0 o and 90 o. Right Angle always measures 90 o. Obtuse Angles measures between 90 o and 180 o. Straight Angle always measures 180°. ABC is a straight angle. Complementary Angles angles whose measures have a sum of 90°. DBE and EBC are complementary.
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Acute Angles measure between 0o and 90o
Right Angle always measures 90o
Obtuse Angles • measures between 90o and 180o
Straight Angle • always measures 180° ABC is a straight angle.
Complementary Angles angles whose measures have a sum of 90° DBE and EBC are complementary
Supplementary Angles angles whose measures have a sum of 180° mABD + mDBC = 124° + 56° = 180°
Adjacent Angles • Angles that share a common side and a common vertex. ABD is adjacent to DBC.