Books Books
AB shall be at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F in CE, from which draw FG in the plane DE at right D angles to CE ; and because AB is , perpendicular...
The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ... - Page 211
by Robert Simson - 1775 - 520 pages

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

Euclides - 1816 - 528 pages
...plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F H in CE, from which draw FG in the plane DE at right angles to CE : And because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line...

## Elements of Geometry: Containing the First Six Books of Euclid: With a ...

John Playfair - 1819 - 317 pages
...at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F in CE, from...draw FG in the plane DE at right angles to CE : And because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line...

## A Popular Course of Pure and Mixed Mathematics ...: With Tables of ...

Peter Nicholson - Mathematics - 1825 - 372 pages
...angles to the plane CK. Let any plane DE pass through AB and let CE be the common section о the planet, DE, CK ; take any point F in CE, from which draw FG in the plane DE at rieht angles to CE: And be- С FBE саше AB is perpendicular to the plane CK, therefore it is also...

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

Euclid, John Playfair - Euclid's Elements - 1826 - 320 pages
...is at right angles to the plane CK. Let any plane DEpass through AB,and letCE be the eommon seetion of the planes DE, CK; take any point F in CE, from whieh draw FG in the plane DEat right angles to CE : And beeause AB is perpendieular to the plane CK,...

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

Robert Simson - Trigonometry - 1827 - 513 pages
...at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F in CE, from which draw FG t 11. 1. in the plane DE at rightf angles to CE: and because AB is perpendicular *3Def. 11. to the...

## Elements of Geometry: Being Chiefly a Selection from Playfair's Geometry

John Playfair - Geometry - 1829 - 186 pages
...through AB is perp. to the plane CK. Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK; take any point F in CE, from which draw FG in the plane DE perp. to CE. Because AB is perp. to the plane CK, it is also perp. to DGAH every line meeting it in...

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

John Playfair - Euclid's Elements - 1833 - 333 pages
...plane DE pass through AB, and let CE be the common section of the planes DE,CK ; take any point Fin CE, from which draw FG in the plane DE at right angles to CE : And because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line...

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

Euclid - 1835 - 513 pages
...at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section of the planes, DE, CK ; take any point F in CE, from...draw FG in the plane DE at right angles to CE : And, because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line...