 | Adrien Marie Legendre - Geometry - 1863 - 464 pages
...and C ; consequently, DA is perpendicular to BC at its middle point A (BI, P. XVI., C.). PROBLEM HI. To draw a perpendicular to a given straight line, from a given point without that line. Let BD be the given line, and A the given point. From A, as a centre, with a radius... | |
 | James Maurice Wilson - Geometry - 1868 - 132 pages
...therefore by Theorem 17, the base AO = the base BO: that is 0 is the point of bisection of AB. PROBLEM 3. To draw a perpendicular to a given straight line from a given point in it. , Let AB be the given line, C the given point in it. Construction. With centre C and .. j ~... | |
 | Isaac Todhunter - Measurement - 1869 - 312 pages
...produce it to meet the circumference again at F. Join CF. Then CF will be at right angles to AB. 46. To draw a perpendicular to a given straight line from a given point without it. Let AB be the given straight line, and C the given point without it. Take any two points... | |
 | John Maxton - Mechanical drawing - 1871 - 372 pages
...given straight line, by aline drawn perpendicular to it ... 47 „ to bisect a circular arc 48 „ to draw a perpendicular to a given straight line, from a given point in the line; First, when the point is near the middle of the line ....... 48 „ Second, when thepnint... | |
 | Manchester univ - 1872 - 380 pages
...intersection of the bisectors of the exterior angles at the base, and the vertex, lie in one straight line. 4. To draw a perpendicular to a given straight line from a given point in it. How can it be done when the point is very near the edge of the paper ? 5. Triangles upon the... | |
 | Charles Davies - Geometry - 1872 - 464 pages
...and C; consequently, DA ie perpendicular to BC at the given point A (BI, P. XVI., C.). PROBLEM HI. To draw a perpendicular to a given straight line, from a given point without that line. Let BD be the given line, and A the given point. From A, as a centre, with a radius... | |
 | Euclid, Charles Peter Mason - Geometry - 1872 - 216 pages
...two right angles, or together equal to two right angles. To prove this proposition we must be able to draw a perpendicular to a given straight line from a given point in the same. (Prop. XI.) We must also know, — 1. That magnitudes which are equal to the same are... | |
 | Adrien Marie Legendre - Geometry - 1874 - 500 pages
...and (7; consequently, DA is perpendicular to BC at the given point A (BI, P. XVI., C.). PROBLEM HI. To draw a perpendicular to a given straight line, from a given point without that line. Let BD be the given line, and A the given point. From A, as a centre, with a radius... | |
 | Association for the improvement of geometrical teaching - Geometry, Modern - 1876 - 66 pages
...base. [Cor. i. and Rule of Identity.] SECTION 4. PROBLEMS. PROB. i. To bisect a given angle. PROB. 2. To draw a perpendicular to a given straight line from a given point in it. PROB. 3. To draw a perpendicular to a given straight line from a given point outside it. PROB.... | |
 | Francis Cuthbertson (geometer.) - 1876 - 102 pages
...perpendicular to it. EUCLID'S AXIOM. — All right angles are eqttal to one another. PROPOSITION XII. To draw a perpendicular to a given straight line from a given point in the same. Let -5Cbe the given straight line, and A the given point in it. It is required to draw... | |
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To draw a perpendicular to a given straight line from a given point without it. 
