## Plane Geometry |

### From inside the book

Results 1-5 of 51

Page vii

... POLYGONS IN GENERAL SYMMETRY EXERCISES · BOOK II . THE CIRCLE . DEFINITIONS ARCS ,

... POLYGONS IN GENERAL SYMMETRY EXERCISES · BOOK II . THE CIRCLE . DEFINITIONS ARCS ,

**CHORDS**, AND TANGENTS PAGE · 1 4 6 6 ས 8 9 15 24 30 44 • 47 56 60 64 ཟླསྐྱ 75 77 MEASUREMENT THEORY OF LIMITS MEASURE OF ANGLES EXERCISES • · vii. Page 76

...

...

**chord**is a straight line that has its extremities in the circumference ; as , the straight line BC ( Fig . 3 ) . 224. A**chord**subtends two conjugate arcs . If the arcs are unequal , the less is called the minor arc , and the greater the ... Page 77

...

...

**chords**; and a circle is circumscribed about a polygon , if all the vertices of the polygon are in the circumference ( Fig . 3 ) . 232. A circle is inscribed in a polygon , if the ...**CHORDS**, AND TANGENTS . 77 ARCS,**CHORDS**, AND TANGENTS. Page 79

... the arc A'B ' . In such a case , the converse theorem is necessarily true , and no proof like that given in the text is required to establish it . PROPOSITION III . THEOREM . 241. In the same circle ARCS ,

... the arc A'B ' . In such a case , the converse theorem is necessarily true , and no proof like that given in the text is required to establish it . PROPOSITION III . THEOREM . 241. In the same circle ARCS ,

**CHORDS**, AND TANGENTS . 74. Page 80

...

...

**chord**. In the equal circles whose centres are O and O ' , let the arcs AB and A'B ' be equal , and the arc AF greater than arc A'B ' . To prove that 1.**chord**AB =**chord**A'B ' ; Proof . 1 . 2 . 2.**chord**AF**chord**A'B ' . Draw the radii ...### Other editions - View all

### Common terms and phrases

ABē ABCD ACē adjacent angles altitude apothem base bisector bisects centre chord circumscribed circle coincide construct a square decagon diagonals diameter divided draw equiangular equidistant equilateral triangle exterior angle feet Find the area Find the locus given angle given circle given length given line given point given square given straight line given triangle greater Hence homologous sides hypotenuse inches inscribed circle intersecting isosceles trapezoid isosceles triangle limit line drawn mean proportional median middle point number of sides obtuse parallel parallelogram perimeter perpendicular PROBLEM Proof prove Q. E. D. PROPOSITION Q. E. F. Ex quadrilateral quantities radii rectangle regular polygon rhombus right angle right triangle secant segments similar polygons square equivalent straight angle tangent THEOREM third side trapezoid triangle ABC triangle is equal vertex vertices

### Popular passages

Page 94 - Any two sides of a triangle are together greater than the third side.

Page 42 - If two triangles have two sides of the one equal, respectively, to two sides of the other, but the included angle of the first greater than the included angle of the second, then the third side of the first is greater than the third side of the second.

Page 191 - 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. To prove that Proof. A Let the triangles ABC and ADE have the common angle A. A ABC -AB X AC Now and A ADE AD X AE Draw BE.

Page 156 - In a series of equal ratios, the sum of the antecedents is to the sum of the consequents as any antecedent is to its consequent.

Page 75 - PERIPHERY of a circle is its entire bounding line ; or it is a curved line, all points of which are equally distant from a point within called the centre.

Page 71 - The sum of the perpendiculars dropped from any point within an equilateral triangle to the three sides is constant, and equal to the altitude.

Page 38 - Two triangles are equal if the three sides of the one are equal respectively to the three sides of the other. In the triangles ABC and A'B'C', let AB = A'B', AC = A'C', BC=B'C'. To prove A ABC= A A'B'C'. Proof. Place A A'B'C' in the position AB'C, having its greatest side A'C' in coincidence with its equal AC, and its vertex at B', opposite B ; and draw BB'.

Page 55 - 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 50 - If the opposite sides of a quadrilateral are equal, the figure is a parallelogram.

Page 33 - An exterior angle of a triangle is equal to the sum of the two opposite interior angles, and therefore greater than either of them.