Prove that straight lines AC and BB1 are perpendicular in rectangular parallelepiped ABCDA1B1CS1D1.
| April 30, 2021 | education
Line AC passes through the diagonal of the front face of the rectangular parallelepiped ABCDB1B1C1D1. At the same time, straight line BB1 passes through the upper face of the parallelepiped, which is located at right angles to the face ABCD. Since these two faces lie in planes perpendicular to each other, then perpendicular to each other and straight lines lying in the corresponding planes.
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