Elementary Geometry: Plane |
From inside the book
Results 1-5 of 40
Page x
... Divided Lines 271 Compounding of Ratios 279 Similar Triangles . 285 Similar Polygons . 295 Surface Ratios 304 Ratios in the Circle 315 Locus Problems 322 BOOK VI . MENSURATION Abbreviated Scale 325 Associated Numerical Ratios 328 Number ...
... Divided Lines 271 Compounding of Ratios 279 Similar Triangles . 285 Similar Polygons . 295 Surface Ratios 304 Ratios in the Circle 315 Locus Problems 322 BOOK VI . MENSURATION Abbreviated Scale 325 Associated Numerical Ratios 328 Number ...
Page 5
... divided by an unlimited straight line is called a half plane . Two figures in the same half plane are said to be at the same side of the straight line . Two figures , one in each half plane , are said to be at opposite sides of the line ...
... divided by an unlimited straight line is called a half plane . Two figures in the same half plane are said to be at the same side of the straight line . Two figures , one in each half plane , are said to be at opposite sides of the line ...
Page 9
... divided into any two parts , either part is said to be the difference of the whole and the other part . If a magnitude is divided into two superposable parts , each part is said to be half of the whole , and the whole is said to be ...
... divided into any two parts , either part is said to be the difference of the whole and the other part . If a magnitude is divided into two superposable parts , each part is said to be half of the whole , and the whole is said to be ...
Page 82
... divided into any number of equal parts , and if through the points of division parallels are drawn to a second side , then these parallels divide the third side into equal parts . ( Prove by 167. ) 175. Definitions . A line is divided ...
... divided into any number of equal parts , and if through the points of division parallels are drawn to a second side , then these parallels divide the third side into equal parts . ( Prove by 167. ) 175. Definitions . A line is divided ...
Page 91
... divided inton - 2 triangles . * A B Let the diagonals be drawn as stated . Begin with a diagonal , such as AC , that joins two alternate vertices , and call this the first diagonal . This first diagonal cuts off one triangle from the n ...
... divided inton - 2 triangles . * A B Let the diagonals be drawn as stated . Begin with a diagonal , such as AC , that joins two alternate vertices , and call this the first diagonal . This first diagonal cuts off one triangle from the n ...
Contents
192 | |
199 | |
206 | |
222 | |
235 | |
242 | |
251 | |
264 | |
89 | |
104 | |
112 | |
120 | |
130 | |
137 | |
147 | |
154 | |
164 | |
169 | |
186 | |
271 | |
279 | |
285 | |
295 | |
305 | |
315 | |
322 | |
328 | |
334 | |
341 | |
Other editions - View all
Common terms and phrases
ABCD adjacent sides altitude angle AOB angle equal angles are equal antecedents apothem base bisector bisects called central angle central line chord circumscribed circles coincide contraposite corresponding sides Definition diagonal difference divided Draw drawn equal angles equal circles equal ratios equiangular equilateral polygon equivalent figure geometry given angle given circle given line given point given polygon given ratio greater half Hence hypotenuse hypothesis inscribed interior angles intersect isosceles triangle less Let ABC line joining line-segments magnitudes measure-number mid-point mth multiple n-gon number of sides number-correspondent opposite sides parallel parallelogram perigon perimeter perpendicular PROBLEM prolonged prove quadrangle radii radius ratio compounded ratio of similitude regular polygons respectively equal rhombus right angle right triangle segments Show similar polygons similar triangles similarly solution statement straight angle straight line subtended superposable surface symmetric tangent THEOREM triangle ABC unequal vertex vertical angle
Popular passages
Page 148 - In every triangle, the square on the side subtending an acute angle is less than the sum of the squares on the sides containing that angle, by twice the rectangle contained by either of these sides, and the straight line intercepted between the perpendicular let fall on it from the opposite angle, and the acute angle.
Page 147 - In an obtuse-angled triangle the square on the side opposite the obtuse angle is greater than the sum of the squares on the other two sides by twice the rectangle contained by either side and the projection on it of the other side.
Page 7 - LET it be granted that a straight line may be drawn from any one point to any other point.
Page 136 - If a straight line be divided into any two parts, the square on the whole line is...
Page 195 - UPON a given straight line to describe a segment of a circle containing an angle equal to a given rectilineal angle.
Page 80 - The straight line joining the middle points of two sides of a triangle is parallel to the third side and equal to half of it 46 INTERCEPTS BY PARALLEL LINES.
Page 305 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Page 287 - ... they have an angle of one equal to an angle of the other and the including sides are proportional; (c) their sides are respectively proportional.
Page 263 - If four magnitudes of the same kind be proportionals, they shall also be proportionals when taken alternately. Let A, B, C, D be four magnitudes of the same kind, which are proportionals, viz.
Page 32 - At a given point in a given straight line, to construct an angle equal to a given angle. Let A be the given point in the straight line AB, and O the given angle.