Become a member. Together, CAP and ADID are committed to a Downtown that is a thriving city center for the diverse Atlanta community including Downtownâs property owners, employees, residents, students and visitors.
In the last lesson we used the Law of Cosines to find the length of the third side of a triangle when you know the length of two sides and the angle in between. This law can also be used to find the measure of an angle when the three sides of a triangle are given. To use the Law of Cosines to find an unknown angle: 1. Identify c as the side across from the angle you are trying to find. 2. Substitute the values into the Law of Cosines.
We also need the angles between the three sides. If you have all the required information(length of the three sides and angles between), the best method would be to use Cartesian coordinates. Let ABCD be required quadrilateral, The lengths and angles of AB, BC and CD are given. Let BC be along x-axis, represent AB and CD using straight lines and locate A and D. Now the fourth side can be easily determined. Views Â· Answer requested by 1 person.