A Text-book of GeometryGinn, 1888 - 386 σελίδες |
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Αποτελέσματα 1 - 5 από τα 43.
Σελίδα 7
... vertex of the angle . 41. If there is but one angle at a given vertex , it is designated by a cap- ital letter placed at the vertex , and is A read by simply naming the letter ; as , angle A ( Fig . 7 ) . But when two or more angles ...
... vertex of the angle . 41. If there is but one angle at a given vertex , it is designated by a cap- ital letter placed at the vertex , and is A read by simply naming the letter ; as , angle A ( Fig . 7 ) . But when two or more angles ...
Σελίδα 8
George Albert Wentworth. vertex and a common side be- tween them ; as , the angles BOD and AOD ( Fig . 10 ) . 45. When one straight line stands upon another straight line and makes the adjacent angles equal , each of these angles is ...
George Albert Wentworth. vertex and a common side be- tween them ; as , the angles BOD and AOD ( Fig . 10 ) . 45. When one straight line stands upon another straight line and makes the adjacent angles equal , each of these angles is ...
Σελίδα 9
... vertex , and the sides of the one are prolongations of the sides of the other , they are called vertical angles . Thus , a and b ( Fig . 15 ) are vertical an- gles . 54. Two angles are called complementary when their sum и d FIG . 15 is ...
... vertex , and the sides of the one are prolongations of the sides of the other , they are called vertical angles . Thus , a and b ( Fig . 15 ) are vertical an- gles . 54. Two angles are called complementary when their sum и d FIG . 15 is ...
Σελίδα 12
... vertex E on B and the side ED in the direction angle DEF will take the position CBH , and the an and ABC will together equal the angle ABH . If the vertex E is placed on B , and the side ED c angle DEF will take the position ABF , and ...
... vertex E on B and the side ED in the direction angle DEF will take the position CBH , and the an and ABC will together equal the angle ABH . If the vertex E is placed on B , and the side ED c angle DEF will take the position ABF , and ...
Σελίδα 17
... vertex C shall fall on the vertex E , and the side CB on the side EF . Then CA will coincide with ED , ( because BCA and FED are straight lines and have two points common ) . Therefore the BCA is equal to the Z FED . 85. COR . 1. All ...
... vertex C shall fall on the vertex E , and the side CB on the side EF . Then CA will coincide with ED , ( because BCA and FED are straight lines and have two points common ) . Therefore the BCA is equal to the Z FED . 85. COR . 1. All ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
AB² ABCD AC² acute angle adjacent angles altitude angle formed angles are equal base bisector bisects called centre chord circumference circumscribed coincide construct a square decagon diagonals diameter Draw equal respectively equiangular equiangular polygon equidistant equilateral polygon equilateral triangle exterior angle feet figure Find the area given circle given line given point given straight line given triangle greater Hence homologous sides hypotenuse inches intersecting isosceles triangle legs length line drawn line joining measured by arc middle points number of sides obtuse opposite sides parallel parallelogram perimeter perpendicular PROPOSITION prove Proof quadrilateral radii ratio rectangle regular inscribed regular polygon rhombus right angle right triangle SCHOLIUM secant segments similar polygons square equivalent straight angle subtended tangent THEOREM third side trapezoid triangle ABC triangle is equal vertex vertices
Δημοφιλή αποσπάσματα
Σελίδα 46 - If two triangles have two sides of one equal, respectively, to two sides of the other, but the included angle of the first greater than the included angle of the second, the third side of the first is greater than the third side of the second...
Σελίδα 69 - The exterior angles of a polygon, made by producing each of its sides in succession, are together equal to four right angles.
Σελίδα 187 - Two triangles having 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.
Σελίδα 64 - 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.
Σελίδα 201 - To construct a parallelogram equivalent to a given square, and having the sum of its base and altitude equal to a given line.
Σελίδα 215 - The perimeters of two regular polygons of the same number of sides, are to each other as their homologous sides, and their areas are to each other as the squares of those sides (Prop.
Σελίδα 161 - In any triangle, the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of those sides and the projection of the other upon that side.
Σελίδα 135 - 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.
Σελίδα 156 - If in a right triangle a perpendicular is drawn from the vertex of the right angle to the hypotenuse : I.
Σελίδα 15 - LET it be granted that a straight line may be drawn from any one point to any other point. 2. That a terminated straight line may be produced to any length in a straight line. 3.