Question

15. Write the definition of actute angle, obtuse angle, right angle and reflex angle with example.
16. Draw any line segment AB. Mark any point Con AB lying between A and B. Verify that AC= AB-CB.
17. Find the number of right angles turned through by the hour hand of a clock when it goes from 3 to 6.​

Answer 1

15 . Acute Angle - An angle less than 90 degrees. Right Angle - An angle that is exactly 90 degrees. Obtuse Angle - An angle more than 90 degrees and less than 180 degrees. ... Reflex Angle - An angle greater than 180 degrees and less than 360 degrees.

16 . is in the picture

17 . The hour hand of a clock revolves by 360° or 4 right angles in one complete round. (a) The hour hand of clock revolves by 90° or one right angle when it goes from 3 to 6. (b) The hour hand of clock revolves by 180° or 2 right angles when it goes from 2 to 8.