Question 2 - Figure it out (Page 53, 54) - Chapter 2 Class 6 - Lines And Angles (Ganita Prakash)

Transcript

Question 2 Estimate the size of each angle and then measure it with a protractor: Classify these angles as acute, right, obtuse or reflex angles.Okay, first let see what angles are acute, obtuse, right or reflex Angle < 90° Angle = 90° 90° < Angle < 180° 180° < Angle < 360° ∴ Required angle = 45° Since angle is less than 90°, it is acute angle ∴ Required angle = 45° Since angle is less than 90°, it is acute angle ∴ Required angle = 170° Since angle is greater than 90°, but less than 180°, it is obtuse angle Reading the black labels ∴ Required angle = 120° Since angle is greater than 90°, but less than 180°, it is obtuse angle ∴ Required angle = 32° Since angle is less than 90°, it is acute angle ∴ Required angle = 98° Since angle is greater than 90°, but less than 180°, it is obtuse angle ∴ Required angle = 98° Since angle is greater than 90°, but less than 180°, it is obtuse angle ∴ Required angle = 98° Since angle is greater than 90°, but less than 180°, it is obtuse angle Since this is a reflex angle, We first find blue angle, and then subtract 360° from it Now, Blue angle = 10° ∴ Required angle = 360° – 10° = 350° And the angle is a reflex angle