Activity: Take a paper circle. Fold the circle from the boundary, inwards. Open the fold. The crease Class 9

Activity: Take a paper circle. Fold the circle from the boundary, inwards. Open the fold. The crease Class 9

Question 1.

Activity: Take a paper circle. Fold the circle from the boundary, inwards. Open the fold. The crease is now a chord (see Fig. B). Now fold the paper again, so that the end points of the chord meet. Open the fold (see Fig. 5.13 C). Class 9

Measure the lengths of the parts into which the chord is divided. The chord gets bisected where the folds intersect. Measure the angle between the creases. The crease of the second fold is along the perpendicular from the centre to the chord. Measure the distance from the centre to the midpoint of the chord. It is the distance from the centre to the chord. Now draw another chord of the same length. How will you do this? We will let you figure this out yourself. Join the centre to the midpoint of the new chord and measure its length. Is it the same as distance from the centre to the first chord?

Answer:

[Note: Students should do this activity on their own.]