You are skiing on a mountain with an altitude of 1200 ft. The angle of depression is 21 degrees. Find the distance " x" you ski down the mountain to the nearest foot.[br][br](what is the distance of line segment CB?)

1. [br]Choose the [b]Segment with Given Length [/b]tool and enter [color=#38761d]1200[/color] . (line segment AB).[br][br]2. [br]Then use the[b] Move [/b]tool to make your line segment vertical. (point A on top).[br][br]3. [br]Choose [b]Perpendicular Line [/b]tool and then click [color=#38761d]point A [/color]and then click onto [color=#38761d]line AB[/color]. (should have to 2 lines - -one horizontal and one vertical and are perpendicular to one another). Angle A should be 90 degrees. [br][br]4. [br]Create a [color=#38761d]point C[/color] (pretty far away from point A) on the horizontal line.[br][br]5. [br]Using the [b]Steps[/b] toolbar, hide both lines, leaving points A, B, and C.[br][br]6. [br]Using the [b]polygon[/b] tool, create a triangle ABC.[br][br]7. [br]Using the [b]Angle [/b]tool, find the angle measurement of C.[br][br]8. [br]Use the [b]Move [/b]tool to adjust point C until the angle of C is exactly 21 degrees. Make sure angle A is 90.[br][br]9. [br]Using the [b]Distance/Length [/b]tool, find the length of line BC.