Plane and solid geometry . 5. 6. 7. Reasons 1. 161, a. 2. § 627. 3. § 636. 4. § 670. 5. § 672. 6. § 674. 7. Arg. 6. 8. § 206. 9. § 161, b. Ex. 1195. Find the locus of all points equidistant from two givenpoints in space. Ex. 1196. Find the locus of all points equidistant from three givenpoints in space. Ex. 1197. Are the supplements of equal dihedral angles equal ?complements ? Prove your answer. Ex. 1198. If two planes are each perpendicular to a third plane,can they be parallel to each other? Explain. If they are parallel toeach other, prove their intersections with the third plane parallel.
Plane and solid geometry . 5. 6. 7. Reasons 1. 161, a. 2. § 627. 3. § 636. 4. § 670. 5. § 672. 6. § 674. 7. Arg. 6. 8. § 206. 9. § 161, b. Ex. 1195. Find the locus of all points equidistant from two givenpoints in space. Ex. 1196. Find the locus of all points equidistant from three givenpoints in space. Ex. 1197. Are the supplements of equal dihedral angles equal ?complements ? Prove your answer. Ex. 1198. If two planes are each perpendicular to a third plane,can they be parallel to each other? Explain. If they are parallel toeach other, prove their intersections with the third plane parallel. 326 SOLID GEOMETRY Proposition XXI. Theorem (Converse of Prop. XX) 676. If the plane angles of two dilvedral angles areequal, the dihedral angles are
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