Tangency Problem 15

Figure shows template ABCDEFG.
Points A, B, C, D, E, F and G are tangent points. CD is a tangent line.
Draw the template in full size.

1. Measure the distance between O and S

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The correct answer will get the participation certificate.

Tangency Problem 14

Figure shows a template ABCDEFG.
Points B, C, D, E, F and G are tangent points. FE is a tangent line.
Draw the template in full size.

1. Measure the radius of Rx

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The correct answer will get the participation certificate.

Tangency Problem 13

Figure shows a template ABCDEFGHI.
Points B, C, D, E, F, G , H and I are tangent points. FE is a tangent line.
A is the vertex point of semi parabola and BC is an quadrant of ellipse.
Draw the template in full size.

1. Measure the length of EF

Mail your answer to: noh4568@yahoo.com.
The correct answer will get the participation certificate.