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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.
The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ... - Page 79
by Euclides - 1816 - 528 pages

## Civil service guide

Robert Johnston (F.R.G.S.) - Civil service - 1872 - 178 pages
...in a semicircle is a right angle; but the an?le in a segment greater than a semicircle is less tban a right angle ; and the angle in a segment less than a semicircle is greater than a right angle. ALGEBRA. I. Specimen Paper. (Time, 3 hours.) 1. Find (1) the sum, (2) the difference, of the two expressions...

## Euclid's Elements of Geometry

Euclid - Geometry - 1872 - 261 pages
...Prop. 21. B. 3), and therefore the angle ABC is also less than a right angle. PART 3.— The angle ABC in a segment less than a semicircle is greater than a right angle. For assume in the opposite circumference any point D, and draw DA and DC. semicircle, is less than...

## Elements of geometry, containing the first two (third and fourth ..., Part 2

Euclides - 1872
...angle in a semicircle is a right anglt and the angle in a segment greater than a semicircle is fe^ than a right angle; and the angle in a segment less than < semicircle is greater than a right angle. Let ABC be a ©, of which O is the centre and BC diameter....

## The Acting Teacher's and Student's in Training Guide and Text Book for ...

Henry Major - Student teachers - 1873
...DC, if produced, passes through the centre: therefore the arc AD is equal to the arc DB. XXXI. — In a circle the angle in a semicircle is a right angle...than a semicircle is greater than a right angle. Let BC be a diameter, and the centre E, and draw CA, dividing the circle into the segments ABC, ADO Join...

## The Elements of Euclid, containing the first six books, with a selection of ...

Euclides - 1874
...equal to the arc DB. Therefore the given arc ADJB is bisected in DQEF PROPOSITION 31. — Theorem. In a circle, the angle in a semicircle is a right...than a semicircle, is greater than a right angle. Let A BCD be a circle, of which the diameter is BC, and centre E ; and let CA be drawn, dividing the circle...

## Pure mathematics, Volume 1

Edward Atkins - 1874
...is equal to the arc DB. Therefore, the given arc is bisected in DQJE.F. Proposition 31. — Theorem. In a circle, the angle in a semicircle is a right...than a semicircle is greater than a right angle. Let ABC be a circle, of which BC is a diameter, and E the centre; and draw CA, dividing the circle into...

## Euclidian Geometry

Francis Cuthbertson - Euclid's Elements - 1874 - 349 pages
...three / s of &AFB, and .-. = two right angles. (i. 24) Similarly it may be proved that PROPOSITION XVI. In a circle, the angle in a semicircle is a right...than a semicircle is greater than a right angle. Let A PB be a © of which C is the centre, ACB a diameter, and AP a chord dividing the © APB into the...

## Pure mathematics, Volume 1

Edward Atkins - 1874
...DQEF Proposition 31. — Theorem. In a circle, the angle in a semicircle is a right angle; but t/ie angle in a segment greater than a semicircle is less...than a semicircle is greater than a right angle. Let ABC be a circle, of which BC is a diameter, and E the centre; and draw CA, dividing the circle into...