Angle btw line and plane, dihedral angle
Problem 1:
Given an isosceles triangle ABC with leg equals 9 cm and base AC=12 cm. The leg AB belongs to a plane . 2 : 1 is the ratio of the orthogonal projections of the other sides on . Find the length of both projections and the angle between ( ; (ABC))
Problem 1:
Problem 2:
Given a pyramid ABCDM with base ABCD - isosceles trapezoid. The perimeter of ABCD equals 32 cm and . All lateral faces determine angles to the base. Find the altitude of the pyramid
Problem 2:
Problem 3:
Given pyramid ABCDM with base ABCD - trapezoid. , , , Find =?
Problem 3:
Problem 4:
Given a regular quadrilateral pyramid ABCDE with base ABCD. If BD= and , find the slant edge.
Problem 4:
Problem 5:
- regular prism. If , , find the distance from B1 to (ACD1)