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" PROP. XI. PROB. To draw a straight line at right angles to a given straight line, from a given point in that line. Let AB be a given straight line, and Ca point given in it; it is required to draw a straight line from the point C at right angles to AB. "
Elements of Geometry: Containing the First Six Books of Euclid, with a ... - Σελίδα 32
των Euclid, John Playfair - 1826 - 320 σελίδες
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...from the given point C, i1 at right angles to the given ftraight line AB. Let AB be a given ftraight line, and Ca point given in it ? it is required to draw a ftraight line from the point C at right angles to AB. Becaufe DC is equal to CE, and FC common to the...

Elements of Geometry;: Containing the First Six Books of Euclid, with Two ...

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The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1806 - 546 σελίδες
...DB, and the straight line AB is divided into two equal parts in the point D. Which was to be done. PROP. XI. PROB. TO draw a straight line at right angles to a given straight line, from a given point in the same. See N. Let AB be a given straight line, and Ca point given in it; it is required to draw...

The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

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...parts in the point-D. Which was to be done. D See Note. a 3 , 8. J. H 10. Def. 1. PROP. XI. PROB. B TO draw a straight line at right angles to a given straight line, from a given poiijt in the same. Let AB be a given straight line, and Ca point given in it: it is required to draw...

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...Prop. X. Prob. To bisect a given finite straight line, that is, to divide it into two equal part«. Prop. XI. Prob. To draw a straight line at right angles to a given straight line, from a given point in the same. Prop. XII. Prob. To draw a straight line perpendicular to a given straight line of an unlimited...

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...DB, and the straight line AB is divided into two equal parts in 4the point D. Which was to be done. PROP. XI. PROB. To draw a straight line at right angles to a given straight line, from a given point in the same. SeeN. Let AB be a given straight line, and Ca point given in it; it is required to draw a...

Elements of Geometry: Containing the First Six Books of Euclid, with a ...

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...line AB is divided into two equal parts in 1he point D. Which was to be done. PROP. XL PROB. To dram a straight line at right angles to a given straight line, from a given point in that line. Take any point D in AC, and (3. 1.) make CE equal to CD, and upon DE describe (1. 1.) the equilateral...




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