Triangle AMB and rectangle ABCD are located so that their planes are mutually perpendicular. Find the corner MAD.
| July 25, 2021 | education
Line AD will be perpendicular to the plane in which triangle MAB lies, since it is perpendicular to the line of intersection of the planes AB.
Then the angle between the straight line AD and any straight line lying in the plane of the triangle MAB will be right, in particular, the angle MAD will be right, that is, it is equal to 90 °.
ANSWER: 90o.
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