Answer to: Explain how to find the sum of the measures of the exterior angles of a polygon. By signing up, you'll get thousands of step-by-step...
Subtract the sum of the angles from 180 to get the third angle of the triangle. For example, if you have a triangle within a quadrilateral that has the angles 20 and 45 degrees you would get a third angle of 115 degrees (180 – 65 = 115). Step 4 Add the two known angles of the...
Try geometry before trigonometry. While you can use trig to find every side and angle, geometry is usually quicker and easier. First, remember the sum of the angles of any triangle is always 180 degrees. If you know 2 angles of a triangle, you can always subtract their sum from 180 to ...
Using Identities to Find Exact Values of Trigonometric FunctionsGiven an angle measure in degrees that is a multiple of three, we apply trigonometric identities to calculate the exact value of the sine function at that angle. In particul...
The centroid of a triangle is the intersection point of the three medians of the triangle. Learn how to find the centroid of a triangle through the...
A sequence is a function whose domain is an ordered list of numbers. These numbers are positive integers starting with 1. Sometimes, people mistakenly use the terms series and sequence. A sequence is a set of positive integers, while a series is the sum of these positive integers. The denot...
and you'll get 180 degrees. If you have a right triangle, one of its angles is 90 degrees by definition. That means the sum of the other two angles has to be 90 degrees, and if you know one of them, you can immediately find the other. But how do you find the angles if you do...
To calculate the other angles, we need the sine, cosine and tangent. In fact, the sine, cosine and tangent of an acute angle can be defined by the ratio between sides in a right triangle. Just like every other triangle, a right triangle has three sides. One of them is the hypothenus...
Calculate the area of one triangle. Remember, to find the area of a triangle, multiply the base by the height, and then divide by 2. Now, multiply that value by 6. Measuring Hexagon Angles To find the sum of the interior angles of a hexagon, divide it ...
to find the height based on what they know about a triangle. For example, when you know the angles of a triangle, trigonometry can help; when you know the area, basic algebra gives the height. Analyze the information you have before developing a game plan for finding a triangle's height...