When calculating the trigonometric functions of an acute angle \(A \), you may use any right triangle which has \(A \) as one of the angles. Since we defined the trigonometric functions in terms of ratios of sides, you can think of the units of measuremen

This angle right over here is well over 180 degrees. So we have to pay attention to this arc to make sure that the tool is looking at the same angle that we are. So once again, we want an acute angle. So this right over here looks like an acute angle. It

Create an acute, right, or obtuse angle using a given vertex. ... Practice: Draw right, acute, and obtuse angles. This is the currently selected item.