An Introduction to Geometry and the Science of Form: Prepared from the Most Approved Prussian Text-books |
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Page xii
... parallelograms , 152. A triangle equivalent to half a parallelogram of equal base and altitude , 153. Case of equivalent triangles , 154. Sum of the angles of a polygon , 155. Value of each angle of a regular polygon , 156. Value of ...
... parallelograms , 152. A triangle equivalent to half a parallelogram of equal base and altitude , 153. Case of equivalent triangles , 154. Sum of the angles of a polygon , 155. Value of each angle of a regular polygon , 156. Value of ...
Page xiii
... parallelogram into an equivalent triangle , 213. To construct a square 1 times as great as a given square , 214. To transform a triangle into an equivalent parallelogram , 215. Two diagonals in a parallelogram bisect each other , 110 ...
... parallelogram into an equivalent triangle , 213. To construct a square 1 times as great as a given square , 214. To transform a triangle into an equivalent parallelogram , 215. Two diagonals in a parallelogram bisect each other , 110 ...
Page xiv
... parallelograms into unequal parts , 218. To divide a parallelogram into 2 , 3 , 4 , or more equal parts , 119 219. A straight line drawn through the middle of a diagonal of a parallelogram bisects the parallelogram , • · • 220. Ratio of ...
... parallelograms into unequal parts , 218. To divide a parallelogram into 2 , 3 , 4 , or more equal parts , 119 219. A straight line drawn through the middle of a diagonal of a parallelogram bisects the parallelogram , • · • 220. Ratio of ...
Page xv
... parallelograms of equal bases , triangles of unequal bases and unequal altitudes , parallelograms in general to one another , the parts into which the sides of a triangle are divi- ded by a line parallel to the base , such parallel line ...
... parallelograms of equal bases , triangles of unequal bases and unequal altitudes , parallelograms in general to one another , the parts into which the sides of a triangle are divi- ded by a line parallel to the base , such parallel line ...
Page 7
... parallelogram . 5. 2 parallelograms ; one with right angles , and the other with oblique angles . 6. Parallelograms in which two of the sides shall be twice , thrice , 4 times longer than the other two . 7. A parallelogram having its ...
... parallelogram . 5. 2 parallelograms ; one with right angles , and the other with oblique angles . 6. Parallelograms in which two of the sides shall be twice , thrice , 4 times longer than the other two . 7. A parallelogram having its ...
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Common terms and phrases
adjacent angles angle BAC angles are equal Bisect centre chord circumference coincide concave angles consequently angle construct a square convex angle convex surface cube curved line cylinder decagonal describe a circle diagonals diameter divided division points draw a line Draw a straight equal altitude equal angles equal bases equivalent erect a perpendicular exterior angles feet found by multiplying given number given square greatest number hexagon homologous sides hypothenuse inches inscribed circle isosceles triangle length let fall line drawn line passes magnitude measured Multiply the number number of lines number of points number of straight opposite parallelogram parallelopiped passes 2 points pendicular pentagon proportion protractor quadrilateral radii radius equal ratio regular polygon right angle semi-circumference set intersecting side AC similar similar triangles solidity sphere straight line suppose tangents triangle ABC triangular prism unequal vertex vertices
Popular passages
Page 130 - The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means.
Page 154 - In a series of equal ratios, any antecedent is to its consequent, as the sum of all the antecedents is to the sum of all the consequents. Let a: 6 = c: d = e :/. Then, by Art.