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# Lesson Worksheet: The Angle between Two Planes and between a Plane and a Straight Line Mathematics

In this worksheet, we will practice finding the measure of an angle between two planes or that between a line and a plane.

**Q9: **

Find, to the nearest degree, the measure of the angle between the planes and .

**Q10: **

If the angle between the plane and the straight line is , find the value of the positive constant given that .