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Identifying Angles

Identifying Angles. 10-2 326-327. Right Angle. Measure is exactly 90 degrees. A. B. C. ABC = 90. Acute Angle. An angle with a measurement of less than 90 degrees (Use the little numbers). D. E. F. DEF 90. Obtuse Angle.

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Identifying Angles

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  1. Identifying Angles 10-2 326-327

  2. Right Angle • Measure is exactly 90 degrees A B C ABC = 90

  3. Acute Angle • An angle with a measurement of less than 90 degrees (Use the little numbers) D E F DEF 90

  4. Obtuse Angle • An angle that has a measure greater than 90 degrees but less than 180 degrees 90 GHI 180 G H I

  5. Straight Angle • An angle that has a measure of exactly 180 degrees JKL = 180 J K L

  6. Perpendicular Lines • Intersecting lines that form 4 right angles R RS and PQ are perpendicular lines The form the angles RTP RTQ QTS STP P Q T The symbol means “is perpendicular to”: RS PQ S

  7. 326-327 • 2-40 even

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