No, it is not possible to make a perfect circle. At it’s most fundamental level, the universe has a minimum length of space called the ‘Planck Length’. Any and all circles that exist in nature therefore do not have infinite sides, but a number of sides equal to their circumference split into planck lengths.

Leonardo da Vinci’s drawing of a male figure perfectly inscribed in a circle and square, known as the “Vitruvian Man,” illustrates what he believed to be a divine connection between the human form and the universe. Beloved for its beauty and symbolic power, it is one of the most famous images in the world.

Renaissance

Giotto

“The circle is one of the hardest shapes to control,” Natalia Dounskaia, a kinesiology professor at Arizona State University, told Nuwer. “The brain doesn’t have enough resources to focus on corrections of movement and do cognitive tasks at the same time.”

For a circle to be perfect, we would need to measure an infinite number of points around the circle’s circumference to know for sure. Each point would need to be precise from the particle level to the molecular level, whether the circle is stationary or in motion, which makes determining perfection a tricky feat.

The circle is the symbol for infinity, because the circle is endless, and may be considered a polygon with an infinite number of sides. The snake or dragon with its tail in its mouth continually devouring itself and being reborn from itself is a symbol of eternity and of the cyclic nature of the universe.

It is not impossible, just very difficult! The artist Giotto di Bondone is known for drawing the perfect circle. Mathematically speaking, there is no such thing as a perfect circle. That, however, hardly matters with drawing—in most cases, you just need to be close enough to be believable.

Nonetheless, a perfect sphere does appear in nature and can be seen in examples such as bubbles, water drops, planets, and atoms. Also, the sun is considered to be the most perfect sphere ever observed in nature. It is the most perfectly round natural object in the entire universe.

Guess again. If you ask someone if they could draw a perfect circle freehand the answer is likely to be ‘no’. Using different areas of your hand as the pivot point allows you to draw different sized circles, perfect for jotting down notes and such in lectures and meetings. …

Yes if you are satisfied with the way the line looks. A steady hand may draw a line that is not only perfectly straight but also parallel to another line, e.g. the edge of the paper. No if you mean a mathematically straight line.

Start from one end of a bisecting line and take the half circle shape up to the next bisecting line, with the rounded edge sitting against the edge of the large outer square. Repeat for each small square until one large circle has been created inside the large square. Erase the square lines. Leave behind the circle.

Put a stick in the ground and place a mark at the tip of its shadow. Wait 30 minutes, and place another mark at the tip of the shadow. Draw a line between the two points and you can see approximately where east and west are. A lot of non-compass ways of navigation rely on the sun—what do you do on a cloudy day?

hexagram

In some of humanity’s oldest belief systems, the five points of the pentagram represent the five earthly materials: the top being spirit, and the other four being earth, air, fire and water.

In a regular pentagram (5-pointed star, NOT Pentagon), the angle in each point is 36 degrees, so the angles in all five points sum to 180 degrees. In an irregular pentagram (NOT Pentagon), the angles might be all different from each other, but the angles in all five points still sum to 180 degrees.