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The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Elements of Geometry: Containing the First Six Books of Euclid, with a ... - Σελίδα 78
των Euclid, John Playfair - 1846 - 317 σελίδες
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## The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - 552 σελίδες
...right angle ; and the angle in a fegment lefs than a femicircle is greater than a right angle. Let ABCD be a circle, of which the diameter is BC, and centre E ; and draw CA dividing the circle into the fegments ABC, ADC, and join BA, AD, DC ; the angle in the...

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

John Playfair - 1795 - 462 σελίδες
...right angle ; and the angle in a fegment lefs than a femicircle is greater than a right angle. Let ABCD be a circle, of which the diameter is BC, and centre E ; arid draw CA dividing the circle into the fegments ABC, ADC, and join BA, AD, DC; the angle in the...

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

John Playfair, Euclid - 1804 - 468 σελίδες
...in a fegment lefs than a femicircle is greater than a right angle. to EBA ; al£o, becaufe Let ABCD be a circle, of which the diameter is BC, and centre E ; draw CA dividing the circle into the fegments ABC, ADC, and join BA, AD, DC ; the angle in the femicircle BAC is a right angle ; and the...

## A Treatise of Practical Surveying: Which is Demonstrated from Its First ...

Robert Gibson - 1806 - 484 σελίδες
...angle ADB is less than half a semicircle, and consequently less than a right angle, fig. 26. Cor. 4. An angle in a segment less than a semicircle, is greater than a right angle, for since the arc AEC is greater than a semicircle, its half, which is the measure of the angle ABC,...

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

Robert Simson - 1806 - 548 σελίδες
...if the centre falls without the triangle, the angle opposite to the side beyond which it is, being in a segment less than a semicircle, is greater than a right angle : wherefore, if the given triangle be acute angled, the centre of the circle falls within it ; if it...

## A Treatise of Practical Surveying, ...

Robert Gibson - 1808 - 488 σελίδες
...angle ADB is less than half a semicircle, and consequently less than a right angle, fig. 26. Cor. 4. An angle in a segment less than a semicircle, is greater than a right angle, for since the arc AEC is greater than a semicircle, 'its half, which is the measure of the angle ABC,...

## The Theory and Practice of Surveying: Containing All the Instructions ...

Robert Gibson - 1811 - 578 σελίδες
...angle ADB is less than half a semicircle, and consequently less than a right angle. Fig. sr. Cor. 4 An angle in a segment less than a semicircle, is greater than a right angle, for since the arc AEC is greater than a semicircle, its half, which is the measure of the angle ABC,...

## Pantologia. A new (cabinet) cyclopædia, by J.M. Good, O. Gregory ..., Τόμος 5

John Mason Good - 1813 - 714 σελίδες
...in a semicircle is a right angle; but the angle in a segment greater than a semicircle is less than a right angle; and the angle in a segment less than a semicircle is greater than a right angle. Prop. XXXII. Theor. If a straight line touches я circle, an J from the point of contact a straight...

## The Theory and Practice of Surveying: Containing All the Instructions ...

Robert Gibson - 1814 - 562 σελίδες
...angle ADBis less than half a semicircle, and consequently less than a right angle. Fig. У!. Cor. 4. An angle in a segment less than a semicircle, is greater than a right angle, for since the arc AEC is greater than a semicircle, its half, which is the measure of the angle ABC,...

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

Euclides - 1816 - 592 σελίδες
...if the centre falls without the triangle, the angle opposite to the side beyond which it is, being in a segment less than a semicircle, is greater than a right angle : Wherefore, if the given triangle be acute angled, the centre of the circle falls within it ; if it...