Tuesday, May 27, 2008

Tangency Problem 12


Figure 4 shows a ABCDEFGH template. Redraw the template shown in full size using geometrical construction methods. AB is a quadrant of an ellipse with O as the center of ellipse.

1. Measure the length of EF,
2. What is the distance between A and B?

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

Tangency Problem 11


Figure shows a template. A, B, C, D, E, F and G are points of tangency. BC is a tangent line. O is the centre points of the ellipse. Draw the template in full size.

1. Measure the radius of Rx,
2. Measure the length of line BC.

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

Tangency Tip 05



How to draw an arc in touch externally and touch through a given point

1. Draw a perpendicular line PR,
2. Draw a parallel line OA,
3. Draw line AP intersecting at K,
4. Draw line OK intersecting at S,
5. Centered at S, draw arc through P and K.

Tangency Tip 04




How to draw an arc in touch internally and through a given point

1. Draw line PR and bisect it.
2. Draw straight line RO to intersect at S.
3. Centered at S, draw an arc through P and R.

Monday, May 26, 2008

Tangency Problem 10





Figure shows a template ABCDEFGHP. Points B, C, D, E, F, G and H are tangent points. AP and CD are tangent lines. P is the centre point of an quadrant of ellipse. Distance between H and O is 78mm. Draw the template in full size.

1. What is the distance between points P and Q?
2. What is the diameter of Rx?

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

Tangency Problem 09


Figure shows a template ABCDEFG.
Points A, B, C, D and G are tangent point. CD is a tangent line.
F is a vertex of half parabola EF.
Draw the template in full size.

1. What is the length of CD?
2. What is the diameter of Rx?

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

Tangency Problem 08


Figure shows a template ABCDEF. A, C, D, E and F are points of
tangency. EF is a tangent line. A is the vertex of the half parabola.
Draw the template in full size
.

1. What is the distance between points O and Q?
2. What is the diameter of Rx?

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

Sunday, May 25, 2008

Tangency Problem 07


Redraw the template with full scale. A, B, C, D, E, F and G are points of tangency. AG is straight line.

1. What is the distance between points P and Q?
2. What is the diameter of Rx?

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

Tangency Problem 06


Redraw the template with full scale. A, B, C, D, E, F and G are points of tangency. AB and GF are straight line. Q is centre of quarter ellipse.

1. What is the distance between points P and Q?
2. What is the diameter of Rx?

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

Tangency problem 05



Redraw the template with full scale. A, B, C, D, and E are points of tangency. AB is a straight line.

1. What is the radius of Rx?
2. What is the length of AB?

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

Tangency Problem 04

Redraw the template with full scale. A, B, C, D, E and F are points of tangency. AB is a straight line.

1. What is the radius of Rx?
2. What is the length of AB?

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

Tangency problem 03


Redraw the template with full scale. C, D, E, F, G and H are points of tangency. Lines AH and FG touch the circles. OB is the axis of the symmetrical parabolic.

1. What is the length of AH and FG?
2. What is the distance between O and P?


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

Tuesday, May 20, 2008

Tangency Problem 02


Draw the template, and measure the radius of Rx.

Email for the answer

Tangency Problem 01


Draw this template and measure the radius of Rx.

Saturday, May 17, 2008

Tangency Tip 03


How to draw a line internally tangency between two circles.

- Draw an arc through center of two circle.
- Draw another arc with radius of R59 plus R39 and intersect at D.
- Draw line AD.
- E and F are the point of tangency.



Tangency Tip 02


How to draw a line tangency to two circle.

- Draw line between two center.
- Draw arc through these center.
- Draw circle with R59-R39 to intersect
the arc at D.
- Draw line AD and project until E.
- Draw parallel line AE and BF.
- EF is line of tangency between two
circle.

Tangency Tip 01





How to draw a line tangency to a circle.
- Draw a line from point P to the
centre of the circle, R.
- Draw an arc through point P and R.
- N is the point of tangency.
- Draw line PN.






 
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