# 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 0 o and 90 o

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#### Presentation Transcript

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°