Acute Angles
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Acute Angles measure between 0 o and 90 o - PowerPoint PPT Presentation


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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



  • 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.





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