 | War office - 1861 - 714 pages
...between the perpendicular and the obtuse angle. 3. If a straight line touch a circle, the straight line drawn from the centre to the point of contact shall...be perpendicular to the line touching the circle. Voluntary Portion. 1. To inscribe a square in a given circle. 2. If two triangles have one angle of... | |
 | Euclides - 1862 - 172 pages
...circle, (in. 16, cor.) QEF PROP. XVIII.— THEOREM. If a straight line touch a circle, the straight line drawn from the centre to the point of contact, shall...be perpendicular to the line touching the circle. (References— Prop. i. 17, 19; m. 1.) Let the straight line DE touch the circle ABC in the point C;... | |
 | Euclides - 1862 - 140 pages
...given circle BCD. QEF PROPOSITION 18. -THEOREM. If a straight line touch a circle, the straight line drawn from the centre to the point of contact, shall be perpendicular to tht line touching tlte circle. (References— Prop. 1. 17, 19; III. 1.) Hypothesis. — Let the straight... | |
 | Euclides - 1864 - 262 pages
...PROPOSITION XVIII. THEOREM. If a straight line touch a circle, the straight line drawn from the center to the point of contact, shall be perpendicular to the line touching the circle. Let the straight line DE touch the circle ^.BCin the point C; take the center F, and draw the straight... | |
 | Euclides - 1864 - 448 pages
...PROPOSITION XVIII. THEOREM. If a straight line touch a circle, the straight line drawn from the center id the point of contact, shall be perpendicular to the line touching the circle. Let the straight line DE touch the circle ABCin the point C; take the eenter F, and draw the straight... | |
 | Euclides - 1865 - 402 pages
...circumference, which shall tonch a given circle. Prop. 18. If a straight line tonch a circle, the straight line drawn from the centre to the point of contact, shall be perpendicular to the line tonching the circle. Prop. 19. If a straight line tonch a circle, and from the point of contact a straight... | |
 | Robert Potts - 1865 - 528 pages
...PROPOSITION XVIII. THEOREM. If a straiffht line touch a circle, the straight line drawn from the center to the point of contact, shall be perpendicular to the line touching tlie circle. Let the straight line DE touch the circle ABC in the point C; take the center F, and draw... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...circle. [III. 16, Cor. PROPOSITION 18. THEOREM. If a straight line touch a circle the straight line drawn from the centre to the point of contact shall...be perpendicular to the line touching the circle. Let the straight line DE touch the circle ABC at the point C ; take F, the centre of the circle ABC,... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 424 pages
...circle. [III. 16, Cor. PROPOSITION 18. THEOREM. If a straight line touch a circle the straight line drawn from the centre to the point of contact shall...be perpendicular to the line touching the circle. Let the straight line DE touch the circle ABC at the point C; take F, the centre of the circle ABC,... | |
 | Robert Potts - 1868 - 434 pages
...PROPOSITION XVIII. THEOREM. // a straight line touch a circle, the straight line drawn, from the center to the point of contact, shall be perpendicular to the line touching the circle. Let the straight line DE touch the circle ABCm the point C; take the center F, and draw the straight... | |
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If a straight line touch a circle, the straight line drawn from the centre to the point of contact shall be perpendicular to the line touching the circle. Let... 
