A Course of Mathematics ...: Designed for the Use of the Officers and Cadets of the Royal Military College, Volume 1C. Glendinning, 1807 - Mathematics |
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Page 181
... angles Q PQR , PQS is a right angle . G S 11. An acute angle is less than a right angle ; as the angle GQS . 12 . An obtuse angle is greater than a right angle ; as the angle GQR . Those are called oblique angles . 13. The sides of a right ...
... angles Q PQR , PQS is a right angle . G S 11. An acute angle is less than a right angle ; as the angle GQS . 12 . An obtuse angle is greater than a right angle ; as the angle GQR . Those are called oblique angles . 13. The sides of a right ...
Page 182
... right angled triangle is that which has one right angle , as D. 19. An acute angled triangle has all its angles acute , as E. 20. An obtuse angled triangle has one obtuse angle , as F. Α F B E 21. Every plane figure bounded by four right ...
... right angled triangle is that which has one right angle , as D. 19. An acute angled triangle has all its angles acute , as E. 20. An obtuse angled triangle has one obtuse angle , as F. Α F B E 21. Every plane figure bounded by four right ...
Page 183
... right line joining any two opposite N angles of a quadrilateral is called a diagonal , as NO . 29. The side PQ upon which any paral- lelogram PQRS , or triangle PSQ , is suppo- sed to stand , is called the base ; and the perpendicular ...
... right line joining any two opposite N angles of a quadrilateral is called a diagonal , as NO . 29. The side PQ upon which any paral- lelogram PQRS , or triangle PSQ , is suppo- sed to stand , is called the base ; and the perpendicular ...
Page 184
... a may coincide with the angle b , and the side BA fall upon ba : Then the angles at B and b be- ing supposed equal , the side BD will fall upon 184 GEOMETRY . THEOREMS Of the angles of right-lined plane Figures Of right-lined plane Figures.
... a may coincide with the angle b , and the side BA fall upon ba : Then the angles at B and b be- ing supposed equal , the side BD will fall upon 184 GEOMETRY . THEOREMS Of the angles of right-lined plane Figures Of right-lined plane Figures.
Page 185
... angles coincide , the other sides , and also the two vertical angles , must coincide , and will therefore be respectively equal . 38. The angles which one right line make with another on the same side , ae together equal to two right angles ...
... angles coincide , the other sides , and also the two vertical angles , must coincide , and will therefore be respectively equal . 38. The angles which one right line make with another on the same side , ae together equal to two right angles ...
Common terms and phrases
angle ACB arith arithmetical arithmetical mean base battalions bisect breadth centre chord ciphers circle circumference consequently corol cosine cube root cubic decimal defilé diameter diff difference distance ditch divided dividend division divisor example farthings feet figure frustum give given line half the arc half the perimeter height Hence horizontal improper fraction inches integer intersection isosceles least common multiple length logarithm mean proportional measure miles mixt number multiplied nearly number of terms opposite angles paces parallel parallelogram perpendicular plane polygon prism pyramid quadrilateral quotient radius ratio rectangle Reduce remainder rhombus right angles right line right-angled triangle scale of equal segment shillings sides similar sine square root subtracted Suppose tangent Theodolite toises VULGAR FRACTIONS whole number yards
Popular passages
Page 100 - Multiply the whole augmented divisor by this last quotient figure, and subtract the product from the said dividend, bringing down to the next period of the given number, for a new dividend. Repeat the same process over again — viz. find another new divisor, by doubling all the figures now...
Page 95 - If the errors are unlike, divide the sum of the products by the sum of the errors, and the quotient will be the answer.
Page 220 - A solid angle is that which is made by the meeting of more than two plane angles, which are not in the same plane, in one point. X. ' The tenth definition is omitted for reasons given in the notes.
Page 180 - Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another.
Page 114 - When any number of quantities are proportionals, as one antecedent is to its consequent, so is the sum of all the antecedents to the sum of all the consequents.
Page 189 - A sector, is any part of a circle bounded by an arc, and two radii, drawn to its extremities. A quadrant, or quarter of a circle, is a sector having a quarter part of the circumference for its arc, and the two radii perpendicular to each other.
Page 334 - To find the area of a triangle. RULE.* Multiply the base by the perpendicular height, and half the product will be the area.
Page 165 - To Divide One Number by Another, Subtract the logarithm of the divisor from the logarithm of the dividend, and obtain the antilogarithm of the difference.
Page 211 - If there be any number of proportionals, as one antecedent is to its consequent, so is the sum of all the antecedents to the sum of all the consequents.
Page 207 - Similar rectilineal figures are those which have their several angles equal, each to each, and the sides about the equal angles proportionals. II. " Reciprocal figures, viz. triangles and parallelograms, " are such as have their sides about two of their " angles proportionals in such a manner, that a side