 To draw a straight line perpendicular to a plane, from a given point above it. Let A be the given point above the plane BH ; it is required to draw from the point A a straight line perpendicular to the plane BH.  Calendar - Side 290av University of St. Andrews - 1896Uten tilgangsbegrensning - Om denne boken
 | Euclid, James Thomson - 1837 - 410 sider
...to DF; the angle ABC is equal (I. 8.) to DEF. Therefore, if two straight lines, &c. PROP. XI. PROB. To draw a straight line perpendicular to a plane, from a given point above it. Let A be the given point above the plane BH ; it is required to draw from A a perpendicular... | |
 | Thomas Grainger Hall - 1841 - 214 sider
...and parallel. But V AB, BC = DE, EF, each to each, and AC = DF, .'. Z. ABC = £. DBF. PROPOSITION XI. To draw a straight line perpendicular to a plane from a given point above it. Let A be the given point, BH the given plane; it is required to draw from the point A, a... | |
 | Euclides - 1841 - 378 sider
...* 33. 1. and therefore* AC is equal and parallel to DF. And because AB, BC are B x PROP. XI. PROB. To draw a straight line perpendicular to a plane, from a given point above it. Let A be the given point above the plane BH; it is required to draw from the point A a straight... | |
 | University of Cambridge - 1841 - 546 sider
...circumferences have the same ratio which the circumferences on which they stand have to one another. 2. Draw a straight line perpendicular to a plane from a given point above it. 3. Find the present value of an annuity for any number of years commencing at the present... | |
 | John Playfair - 1842 - 332 sider
...EF, and the base AC to the base DF ; the angle ABC is equal (8. 1.) to the angle DEF. PROP. X. PROB. To draw a straight line perpendicular to a plane, from a given point above it. Let A be the given point above the plane BH, it is required to draw from the point A a straight... | |
 | Scottish school-book assoc - 1845 - 444 sider
...and the base AC to the base DF, .-. the ZABC = the £DEF, (Prop. 9.) PROPOSITION LXXXVI. — PROBLEM. To draw a straight line perpendicular to a plane, from a given point above it. Let A be the given point above the plane BH ; it is required to draw from the point A a |... | |
 | Euclid - 1845 - 218 sider
...equal§ to the angle DEF. Therefore, if two straight lines, § si &c. QED PROPOSITION XI. PBOB. — To draw a straight line perpendicular to a plane, from a given point above it. Let A be the given point above the plane BH; it is required to draw from the point A, a straight... | |
 | Euclid, John Playfair - 1846 - 334 sider
...and the base AC to the base ' DF ; the angle ABC is equal (8. 1.) to the angle DEF. PROP. X. PROB. To draw a straight line perpendicular to a plane, from a given point above it. Let A be the given point above the plane BH, it is required to draw from the point A a straight... | |
 | Thomas Gaskin - 1847 - 301 sider
...XIV.) 1. SIMILAR triangles are to one another in the duplicate ratio of their homologous sides, 2. Draw a straight line perpendicular to a plane from a given point without it. 3. Shew that the equation to the ellipse referred to any pair of tangents as axes, is +... | |
 | Bengal (India) - 1848 - 520 sider
...regular polygon given, how to inscribe another in a circle, having double the number of sides. 10. To draw a straight line perpendicular to a plane from a given point above it. Trigonometry, Plane and Spherical. 11. Prove the following : Sin a = Cos (— + a) Cos a... | |
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