In elementary high school trigonometry one learned the basic laws for oblique triangles including the law of sines, law of cosines, Mollweide formulas, and Heron’s Formula.

Below are depicted two triangles that have sides of length of length a and b, and an angle A opposite the side of length a. Solve the triangle ABC given that B = 113.72 , a = 189.6, and b = …

The Problem: given some side lengths and/or angles in a triangle, find its remaining sides and angles. We’ve seen how to do this with right triangles, but now we need to do this with oblique …

5-4 Area of an Oblique Triangle Case 1: When given 2 sides and the included angle or two angles and one side: 1 2 Area = = ab sin C Area = 1 bc sin A 2 Area = - ac sin B 1 2 Case 2: When …

In this lesson, we will learn how to use the trig functions to solve for any triangle. First, we need to review a couple of facts about triangles. All triangles have angles that add up to 180°.

Straight Leg Cross Reach Anchor: None, body weight Start: Lie on your back with legs and arms straight in the air. Movement: Using your oblique, lift one shoulder blade off the ground and …

Derivation of the Law of Sines Start with an oblique triangle, either acute or obtuse. Let h be the length of the perpendicular from vertex B to side AC (or its extension). Then c is the …