 | Edward Olney - 1872 - 562 σελίδες
...perpendiculars EF and A'B' which shall be perpendicular to PD, through D. PROPOSITION VI. 399. Theorem. — If from the foot of a perpendicular to a plane a line be drawn at right angles to any line of the plane, and this intersection be joined with any point in the perpendicular, the last line is... | |
 | Edward Olney - 1872 - 472 σελίδες
...perpendiculars EF and A'B' which shall be perpendicular to PD, through D. PROPOSITION TI. 399. Theorem. — If from the foot of a perpendicular to a plane a line be drawn at right angles to any line of the plane, and this 'Intersection be joined with any point in the perpendicular, the last line is... | |
 | Edward Olney - 1872 - 270 σελίδες
...perpendiculars EF and A'B' which shall be perpendicular to PD, through D. PROPOSITION VI. 399. Theorem,.—If from the foot of a perpendicular to a plane a line be drawn at right angles to any line of the plane, and this intersection be joined with any point in the perpendicular, the last line is... | |
 | William Guy Peck - 1876 - 376 σελίδες
...plane; and of two unequal lines, the less line has the greater inclination. PROPOSITION V. THEOREM. If from the foot of a perpendicular to a plane, a line is drawn perpendicular to any line of the plane, and if the point of intersection is joined with any... | |
 | Edward Olney - 1877 - 272 σελίδες
...perpendiculars EF and A'B' which shall be perpendicular to Pp, through D. PROPOSITION VI. 399, Theorem.—If from the foot of a perpendicular to a plane a line be drawn at right angles to any line of the plane, and this intersection be joined with any point in the perpendicular, the last line is... | |
 | Edward Olney - 1879 - 278 σελίδες
...perpendiculars EF and A'B' which shall be perpendicular to PD, through D. PROPOSITION VI. 399. Theorem. — If from the foot of a perpendicular to a plane a line le drawn at right angles to any line of the plane, and this intersection lie joined with any point... | |
 | Alfred Hix Welsh - 1883 - 326 σελίδες
...(See Th. IT, Sch.). 4. To erect a perpendicular to a plane from a point within the plane. THEOREM IV. If from the foot of a perpendicular to a plane, a line be drawn at right angles to any line of the plane, and this point of intersection be joined with any point of the perpendicular, the last... | |
 | Webster Wells - 1894 - 400 σελίδες
...the point to the plane. (The proof is left to the student.) PROPOSITION VII. THEOBEM. 410. If through the foot of a perpendicular to a plane a line be drawn...at right angles to any line in the plane, the line drawn from its intersection with this line to any point in the perpendicular will be perpendicular... | |
 | Charles Ambrose Van Velzer, George Clinton Shutts - 1894 - 522 σελίδες
...of two concentric circles, whose radii are 3 and 6 respectively. PROPOSITION IX. THEOREM. 350. //, from the foot of a perpendicular to a plane, a line be drawn perpendicular to any line of tlie plane, and, from, the point of intersection, a line be drawn to any... | |
 | Webster Wells - 1894 - 394 σελίδες
...the point to the plane. (The proof is left to the student.) PROPOSITION VII. THEOREM. 410. If through the foot of a perpendicular to a plane a line be drawn at r'ujht angles to any line in the plane, the line drawn from its intersection with this line to any... | |
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If from the foot of a perpendicular to a plane a line be drawn at right angles to any line of the plane, and... 
