Posted by abhigyan on Monday, June 17, 2013 at 2:11am.
using glazed paper ,show that 3/7 and 9/21 are in prpportion.

mathematics  MathMate, Monday, June 17, 2013 at 6:43am
The way to proceed is:
1. plot the two points (3,7) and (9,21) on graph paper
2. join the two points with a straight line (using a straightedge)
3. If the line passes through the origin, then the two ratios are in proportion.
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