"how To Draw The Perfect Circumference Of A Circle - The Geometrical And Mathematical Way!"

Описание к видео "how To Draw The Perfect Circumference Of A Circle - The Geometrical And Mathematical Way!"

Determine the length of the circumference for a circle of radius 21mm.
Construction:
1. With the center O draw a circle of radius 21mm.
Draw a diameter AB.
2. Draw a tangent AC equals 3 times of AB.
3. Draw a radius OD making an angle of 30º with OB.
4. From D draws a line DE perpendicular to line OB.



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