Question 2 - Figure it out (Page 51, 52) - Chapter 2 Class 6 - Lines And Angles (Ganita Prakash)

Transcript

Question 2 Use a protractor to find the measure of each angle. Then classify each angle as acute, obtuse, right, or reflex. a. ∠PTR b. ∠PTQ c. ∠PTW d. ∠WTP Okay, first let see what angles are acute, obtuse, right or reflex Angle < 90° Angle = 90° 90° < Angle < 180° 180° < Angle < 360° a. ∠PTR ∴ ∠ PTR = 30° Since angle is less than 90°, it is acute angle b. ∠PTQ ∴ ∠ PTQ = 120° Since angle is greater than 90°, but less than 180°, it is obtuse angle c. ∠PTW ∴ ∠ PTW = 103° Since angle is greater than 90°, but less than 180°, it is obtuse angle d. ∠WTPNow, ∠ PTW = 103° And, Here ∠ WTP is a reflex angle ∠ WTP = 360° – 103° = 257°