

Chegg Guided Solutions for College Geometry A Discovery Approach 2nd Edition: Chapter 7.3

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  • Step 1 of 3


    Let l be the line where the two planes meet.

    Let P be the point on line l and the plane containing the points A, B, and O.

    This gives us the two congruent right triangles ?AOP and ?BOP where angles A and B are right angles.

    Also have

  • Step 2 of 3

    Graph of two planes:

    Picture 1

  • Step 3 of 3

    Then the height of ?AOP can be found using the definition of the sine function

    Since the triangles ?AOP and ?BOP are congruent, the distance AB is 2 times h, giving us

    Therefore, the distance between two points is

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