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Q&A for How to Draw a Parabolic Curve (a Curve with Straight Lines)

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How do I change my layout from square to round?

Community Answer

Use a compass to draw a circle, as shown in the example. This can be done on any type of paper.

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Question

How do I make a parabolic curve without a ruler?

Community Answer

Use the edge of a piece of paper or anything straight, or go freehand. Visually guess the distances if you don't have graph paper.

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Question

How do I draw the center of a parabola?

Community Answer

Technically the center of a parabola is undefined since a parabola exists infinitely.

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Question

Can you explain the cube more clearly?

Community Answer

It's just 3 squares at a slanted angle. Just make the same marks on the sides like you would do on a single square for all three parts and do the curves normally.

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Question

Where is the focal point in the first example?

Community Answer

In the drawing, there are 10 units in X and 10 in Y. The focal point is where the line is equadistant from the directrix, so it must be at X-10, Y=10.

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Question

Where is the vocal point in the first example?

Community Answer

It is at 6 X 6. It must be at the height where the edge is at 45 degrees and where the center is at 90 degrees.

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Question

How can straight lines curve?

Community Answer

Straight lines can't curve. It's the individual lines that are positioned at different angles that make it seem like it curves.

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