...equal and their planes are parallel. 10 . If two planes are perpendicular to each other, a line drawn in one of them perpendicular to their intersection is perpendicular to the other. 11. If a line is perpendicular to a given plane, every plane which contains this line is perpendicular...

...Prove that AOB is a right angle. 5. Prove: If two planes are perpendicular to each other, a line drawn in one of them perpendicular to their intersection is perpendicular to the other. 6. a) Prove: If a plane intersects a sphere, the intersection is a circle. b) Find the radius of the...

...plane through the line is also perpendicular to that plane. 15. 7/ two planes are perpendicular, a line in one of them perpendicular to their intersection is perpendicular to the other. 16. The measure of the dihedral angle between two intersecting planes is that of the plane angle cut...

...their planes are parallel. [21*, cd*] 10. If two planes are perpendicular to each other, a line drawn in one of them perpendicular to their intersection is perpendicular to the other. [23*, cd*] 11. If a line is perpendicular to a given plane, every plane which contains this line is...

...right angles. • PROBLEM 795 If two planes are perpendicular to each other, prove that a line drawn in one of them perpendicular to their intersection is perpendicular to the other plane. Solution; In the accompanyir m intgjsects n in CD. Line 1 show Aß J_ m . figure, planç m _L...