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### Spis tre¶ci

 PLANE GEOMETRY 9 Units of Measure 16 BOOK II 59 BOOK III 88 Problems in the Construction of Figures in Plane Geometry 130 Practical Problems 142 BOOK VI 152 BOOK VII 172
 Trigonometrical Lines for Arcs exceeding 90 270 Plane Trigonometry Practically Applied 272 RightAngled Trigonometry 288 Practical Problems 295 Practical Problems 305 SECTION II 330 SECTION III 337 Napiers Analogies 348

### Popularne fragmenty

Strona 320 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Strona 65 - If four magnitudes are in proportion, the sum of the first and second is to their difference as the sum of the third and fourth is to their difference.
Strona 121 - In a given circle to inscribe a triangle equiangular to a given triangle. Let ABC be the given circle, and DEF the given triangle ; it is required to inscribe in the circle ABC a triangle equiangular to the triangle DEF.
Strona 56 - If a straight line be divided into two equal parts, and also into two unequal parts; the rectangle contained by the unequal parts, together with the square of the line between the points of section, is equal to the square of half the line.
Strona 34 - Conversely: if two angles of a triangle are equal, the sides opposite to them are equal, and the triangle it itosceles.
Strona 126 - To inscribe a regular polygon of a certain number of sides in a given circle, we have only to divide the circumference into as many equal parts as the polygon has sides : for the arcs being equal, the chords AB, BC, CD, &c.
Strona 22 - If two parallel lines are cut by a third straight line, the sum of the two interior angles on the same side of the secant line is equal to two right angles.
Strona 277 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Strona 94 - 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.
Strona 30 - Therefore all the interior angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.