Primary Elements of Plane and Solid Geometry: For Schools and AcademiesWilson, Hinkle & Company, 1862 - 98 σελίδες |
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Αποτελέσματα 1 - 5 από τα 42.
Σελίδα 13
... PERPENDICULAR to another when it makes right angles with it ; OBLIQUE , when it makes unequal angles . 4. Two straight lines are said to be PARALLEL to ( 13 ) BOOK I PLANE GEOMETRY -RATIOS Sec IV Sec V Straight Lines and their Angles ...
... PERPENDICULAR to another when it makes right angles with it ; OBLIQUE , when it makes unequal angles . 4. Two straight lines are said to be PARALLEL to ( 13 ) BOOK I PLANE GEOMETRY -RATIOS Sec IV Sec V Straight Lines and their Angles ...
Σελίδα 14
... perpendicular to AB , each of these angles will be a right angle ( Definition 3 , Section IV ) . But if DC is oblique to AB , erect the perpendicular CE . Now , the part ACE of the obtuse angle ACD , is a right angle ; and the remaining ...
... perpendicular to AB , each of these angles will be a right angle ( Definition 3 , Section IV ) . But if DC is oblique to AB , erect the perpendicular CE . Now , the part ACE of the obtuse angle ACD , is a right angle ; and the remaining ...
Σελίδα 17
... perpendicular to the other . Cor . 2. If two straight lines are both perpendicular to a third , they are parallel . EXERCISES .. 1. Prove that the sum of all the adjacent angles made by any number of straight lines meeting in one point ...
... perpendicular to the other . Cor . 2. If two straight lines are both perpendicular to a third , they are parallel . EXERCISES .. 1. Prove that the sum of all the adjacent angles made by any number of straight lines meeting in one point ...
Σελίδα 19
... perpendicular let fall from the vertex on the base , or the base produced . 5. A triangle , or other polygon , is called equiangu- lar when all its angles are equal ; equilateral , when all its sides are equal . 6. Two polygons are ...
... perpendicular let fall from the vertex on the base , or the base produced . 5. A triangle , or other polygon , is called equiangu- lar when all its angles are equal ; equilateral , when all its sides are equal . 6. Two polygons are ...
Σελίδα 22
... perpendicular to the middle point of the base . For AD is equal to DB ; also , the angles CDA , CDB , being equal , are right angles ( Def . 2 , Sec . 4 ) . Cor . 2. An equilateral triangle is also equian- gular . THEOREM IX . The ...
... perpendicular to the middle point of the base . For AD is equal to DB ; also , the angles CDA , CDB , being equal , are right angles ( Def . 2 , Sec . 4 ) . Cor . 2. An equilateral triangle is also equian- gular . THEOREM IX . The ...
Άλλες εκδόσεις - Προβολή όλων
Primary Elements of Plane and Solid Geometry: For Schools and Academies E W (Evan Wilhelm) 1827-1874 Evans Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2021 |
Primary Elements of Plane and Solid Geometry: For Schools and Academies E. W. 1827-1874 Evans Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
AB² ABCDEF allel alternate angles altitude angle BAC angles ABC apothegm base multiplied bisect called chord circle circumference cone consequently convex surface diagonals diameter divided draw Eclectic Reader equal Theo equal to half equivalent frustum Geometry given point half the arc half the product Hence hypotenuse included angle inscribed angle intersect isosceles triangle Let ABCD let fall McGuffey's measured by half mutually equiangular mutually equilateral number of equal number of sides opposite parallelogram perimeter perpendicular perpendicular distance prism proportion proved Published by W. B. quadrilateral radii radius Ray's rectangle regular inscribed regular polygon regular pyramid right angles right parallelopiped right-angled triangle Schol semicircle side BC slant hight solidity square straight line SUPT tangent THEOREM trapezoid triangles ABC triangles are equal triangular vertex W. B. SMITH
Δημοφιλή αποσπάσματα
Σελίδα 69 - If from a point without a circle, a tangent and a secant be drawn, the tangent will be a mean proportional between the secant and its external segment.
Σελίδα 42 - The circumference of every circle is supposed to' be divided into 360 equal parts, called degrees ; each degree into 60 minutes, and each minute into 60 seconds. Degrees, minutes, and seconds are designated by the characters °, ', ". Thus 23° 14' 35" is read 23 degrees, 14 minutes, and 35 seconds.
Σελίδα 21 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Σελίδα 47 - It follows, then, that the area of a circle is equal to half the product of its circumference and its radius.
Σελίδα 72 - The areas of two circles are to each other as the squares of their radii. For, if S and S' denote the areas, and R and R
Σελίδα 33 - The square described on the hypothenuse of a right-angled triangle is equivalent to the sum of the squares described on the other two sides.
Σελίδα 38 - The area of a regular polygon is equal to half the product of its apothem and perimeter.
Σελίδα 52 - PROBLEM VII. Two angles of a triangle being given, to find the third angle. The three angles of every triangle are together equal to two right angles (Prop.
Σελίδα 30 - The area of a rectangle is equal to the product of its base and altitude.
Σελίδα 69 - 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. either the sides adjacent to the equal...