Question 4 - Figure it out (Page 45, 46) - Chapter 2 Class 6 - Lines And Angles (Ganita Prakash)

Transcript

Question 4 Here is a toy with slanting slabs attached to its sides; the greater the angles or slopes of the slabs, the faster the balls roll. Can angles be used to describe the slopes of the slabs? What are the arms of each angle? Which arm is visible and which is not? Can angles describe the slope of each slab? Yes! Each slab makes an angle with horizontal line parallel to the base The greater the angle, the steeper the slope The steeper the slope, the faster the ball rolls down What are the arms of each angle? Each angle has two arms: One arm is the slanting slab Second arm is horizontal line parallel to the base These two rays form an angle at their intersection Which arm is visible and which is not? The slanting slab is clearly visible The horizontal line is not visible but we can draw it So: Visible arm = slanted slab Invisible arm = Horizontal line parallel to the base