A Course of Mathematics, Vol. 2 of 2: Composed, and More Especially Designed for the Use of the Gentlemen Cadets in the Royal Military Academy at Woolwich (Classic Reprint) - Hardcover

Charles Hutton

9780484122269: A Course of Mathematics, Vol. 2 of 2: Composed, and More Especially Designed for the Use of the Gentlemen Cadets in the Royal Military Academy at Woolwich (Classic Reprint)

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ISBN 10: 0484122266 ISBN 13: 9780484122269

Publisher: Forgotten Books, 2020

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Excerpt from A Course of Mathematics, Vol. 2 of 2: Composed, and More Especially Designed for the Use of the Gentlemen Cadets in the Royal Military Academy at Woolwich

Hence, a right angle, being measured by a quadrant, or quarter of the circle, is an angle of 90 degrees; and the sum of the three angles of every triangle, or two right angles, is equal to 180 degrees. Therefore, in a right-angled triangle, taking one of the acute angles from 90 degrees, leaves the other acute angle; and the sum of two angles, in any triangle, taken from 180 degrees, leaves the third angle; or one angle being taken from 180 degrees, leaves the sum of the other two angles.

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