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CLASSIFICATION OF ANGLES

CLASSIFICATION OF ANGLES. Angles Angles are classified according to their measures. Acute Angles an angle measuring between 0 and 90 degrees. Obtuse Angles an angle measuring between 90 and 180 degrees. Right Angles an angle measuring exactly 90 degrees.

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CLASSIFICATION OF ANGLES

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  1. CLASSIFICATION OF ANGLES

  2. AnglesAngles are classified according to their measures.

  3. Acute Anglesan angle measuring between 0 and 90 degrees

  4. Obtuse Anglesan angle measuring between 90 and 180 degrees

  5. Right Anglesan angle measuring exactly 90 degrees.

  6. Obtuse Anglesan angle measuring between 90 and 180 degrees

  7. Use the diagram to find the measure of the indicated angle. Then classify the angle. a.KHJ b. GHK c. LHK d. GHL EXAMPLE 1 Measure and classify angles SOLUTION A protractor has an inner and an outer scale. When you measure an angle, check to see which scale to use.

  8. o a.HJ is lined up with the 0 on the inner scale of the protractor. HKpasses through 55 on the inner scale. So, mKHJ = 55 . It is an acute angle. o o b.HG is lined up with the 0 on the outer scale and HKpasses through 125 on the outer scale. So,mGHK = 125 . It is an obtuse angle. o c.m LHK = 35. It is an acute angle. d.m GHL= 90. It is a right angle. EXAMPLE 2 Measure and classify angles

  9. QUIZ 1. Name all the angles in the diagram at the right. Which angle is a right angle? an acute angle?

  10. ANSWER PQR , PQS, RQS . PQS is a right angle . . PQR & SQR are acute angles . QUIZ 1. Name all the angles in the diagram at the right. Which angle is a right angle? an acute angle/s?

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