### Home > CALC > Chapter 1 > Lesson 1.2.3 > Problem 1-54

1-54.

You should recognize *g* as the equation of a semicircle, centered at the origin with radius 6.

View the eTool. The height of the triangle is 5 and the hypotenuse is 6. Use these lengths to calculate the measure of the central angle.

Use the eTool below for parts (a) - (c).

Click the link at right for the full version of the eTool: Calc 1-54 HW eTool