Unit Circle Charts

Download these free Sample Unit Circle Charts in MS Word format to assist you in preparing your own Unit Circle Chart for internal or external usage.

Around the world, students who learn mathematics and especially trigonometry, usually feel that it’s not easy and understanding different theorems and equations of trigonometry is a difficult task. Moreover, there are only fewer occasions and places in real life where someone actually gets to use trigonometry equations and formulas. This is true to some extent but there are still some theorems that we use in regular life without even noticing that it’s trigonometry i.e. Pythagorean Theorem or Unit Circle. A unit circle is exactly what it sounds i.e. a circle with a unit radius i.e. 1cm or 1 inch and it’s used to define various angles and values of sine, cosine, and tangent.

Applications of Unit Circle Charts:

One of the most common applications of a unit circle is when you are about to measure the height of a building. Unlike horizontal objects that are lying on the ground so you can just measure their length and width, it’s not possible to physically measure the height of a tall building because you can’t just climb up the building and use a really long measuring tape. Luckily you don’t have to go through that trouble and instead, you can just use the unit circle chart to measure the height. Keep in mind that it’s not like you will ask the unit circle chart to tell you the height of the building in front of you and it will be shown on the paper but you still need to do some basic measurements i.e. measure the angle of the building, mark the point where the shadow of the building ends on the ground, etc.

More commonly, in construction works and civil surveying, trigonometry equations i.e. Pythagorean Theorem and unit circle charts are widely used around the world. Measuring the area of a plan field or surface is not difficult but this same job becomes complex when the terrain is uneven i.e. there are mountains, valleys, and dump sites in the field. Here the construction workers can use unit circle charts to accurately measure the area and calculate the estimated cost of material, the amount of material to construct something i.e. a bridge, road or dam, etc. Within the cities where tall buildings are built, this unit circle chart is used by civil workers to verify if a building has correct angles on the edges i.e. right angle which means the building is constructed accurately.

Free Unit Circle Charts:

Here are previews and download links for these Unit Circle Charts that anyone can use to prepare and print his own Unit Circle Chart.

Additionally, law enforcement agencies use unit circles and other trigonometry equations to solve crimes and understand a crime scene i.e. checking the angle of a whole to determine the origin of a bullet or missile or evaluating a traffic accident to determine what happened, whose mistake it was and how it can be prevented in the future. Pilots and airplane flight controllers use the unit circle to accurately calculate how long it will take the flight to reach its destination or exactly when the pilot should start the descent to safely land on the runway at the right speed. If you are still looking for something interesting, get this, a pizza person uses the unit circle theorem to cut the pizza into 6 or 8 or even more equal slices without even knowing that he is using trigonometry.