Question 2 - Figure it out - Pag 144, 145 - Chapter 6 Class 7 - Constructions and Tilings (Ganita Prakash II)

Transcript

Question 2 Construct the 8-petalled figure shown in Fig. 6.5.We observed that this figure is a combination of 45° angles Let’s construct it Steps of Construction Draw a horizontal line of length 6 cm (could be any length) Mark its mid-point as point O 3. Now making 90° Taking O as center and any radius, draw an arc cutting line at A. 4. Taking A as center and with the same radius as before, draw an arc intersecting the previously drawn arc at point B. 5. With B as center and the same radius, draw an arc cutting the arc at C 6. With B and C as centers and radius more than 1/2 BC, draw two arcs intersecting at P. 7. Join OP. 8. Extend OP downwards alsdo Now we draw bisector of ∠ AOP 9. Mark point Q as point where OP intersects the arc 10. Now, taking B and Q as centers, and radius greater than 1/2 BQ, draw two arcs intersecting at R. 11. Join OR. Thus, ∠ AOR = 45° 12. Similarly, we make other 45° angl;es Drawing the curve We draw a circle with center O Mark green points where circle intersects the line Taking point O and green point as end-points, we draw curves like we drew while making the eye 4. Shade the curves