A Text-book of GeometryGinn, 1888 - 386 σελίδες |
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Αποτελέσματα 1 - 5 από τα 90.
Σελίδα 7
... equal if they can be made to coincide . A FIG . 7 . FIG . 8 . d α FIG . 9 . B 43. If the line AD ( Fig . 8 ) is drawn so as to divide the angle BAC into two equal parts , BAD and CAD , AD is called the bisector of the angle BAC . In ...
... equal if they can be made to coincide . A FIG . 7 . FIG . 8 . d α FIG . 9 . B 43. If the line AD ( Fig . 8 ) is drawn so as to divide the angle BAC into two equal parts , BAD and CAD , AD is called the bisector of the angle BAC . In ...
Σελίδα 11
... equal parts called minutes , and the minute into sixty equal parts , called seconds . Degrees , minutes , and seconds are denoted by symbols . Thus , 5 degrees 13 minutes 12 seconds is written , 5 ° 13 ′ 12 ′′ . A right angle is ...
... equal parts called minutes , and the minute into sixty equal parts , called seconds . Degrees , minutes , and seconds are denoted by symbols . Thus , 5 degrees 13 minutes 12 seconds is written , 5 ° 13 ′ 12 ′′ . A right angle is ...
Σελίδα 15
... equal to B , C is equal to D. ( Direct . ) If C is equal to D , A is equal to B. ( Converse . ) 78. The opposite of a proposition is formed by stating the negative of its hypothesis and its conclusion . Thus , If A is equal to B , C is ...
... equal to B , C is equal to D. ( Direct . ) If C is equal to D , A is equal to B. ( Converse . ) 78. The opposite of a proposition is formed by stating the negative of its hypothesis and its conclusion . Thus , If A is equal to B , C is ...
Σελίδα 16
George Albert Wentworth. 1. Things which are equal to the same thing are each other . 2. If equals are added to equals the sums are equ 3. If equals are taken from equals the remai equal . 4. If equals are added to unequals the sums ar ...
George Albert Wentworth. 1. Things which are equal to the same thing are each other . 2. If equals are added to equals the sums are equ 3. If equals are taken from equals the remai equal . 4. If equals are added to unequals the sums ar ...
Σελίδα 17
... equal . C cent . andum A B E F D Let LBCA and FED be any two straight angles . To prove Proof . Apply the LBCA -- Z ... equal to the Z FED . 85. COR . 1. All right angles are equal . $ 59 86. COR . 2. The angular units , degree , minute ...
... equal . C cent . andum A B E F D Let LBCA and FED be any two straight angles . To prove Proof . Apply the LBCA -- Z ... equal to the Z FED . 85. COR . 1. All right angles are equal . $ 59 86. COR . 2. The angular units , degree , minute ...
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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.