Charles Link said:If I understand the problem correctly, side ## A ## makes an angle of 20 degrees with side ## C ##, and the angle opposite side ## C ## is angle ## c= 65 ## degrees. If that is correct, the law of cosines can be used to find side ## C ##: ## \\ ## ## C^2=A^2+B^2-2AB \cos(c) ##. ## \\ ## It would help to have a diagram, but I think I got it right.
Vector triangles are a visual representation of the forces acting on an object. They use arrows to indicate the direction and magnitude of the forces, and can be used to determine the resulting net force on the object.
To draw a vector triangle, first determine the forces acting on the object and their respective directions and magnitudes. Then, draw the forces as arrows on a diagram, making sure to properly label them. Finally, draw the resultant vector by connecting the tail of the first force to the head of the last force.
The purpose of a vector triangle is to determine the net force acting on an object. By using vector addition, we can find the resultant force and determine if the object will accelerate, decelerate, or remain at a constant speed.
If the vector triangle closes, it means that the forces are balanced and there is no net force acting on the object. This can happen in two ways: when the forces are equal and opposite, or when the forces are arranged in a way that they cancel each other out.
You can use a vector triangle to solve problems by breaking down the forces into their x and y components, and then using trigonometry to find the resultant force. This allows you to determine the direction and magnitude of the net force acting on the object.