Plane and Solid Geometry |
From inside the book
Results 1-5 of 74
Page 11
George Albert Wentworth. 63. When one straight line meets another straight line and makes the adjacent angles equal , each of these angles is called a right angle ... Angles that are neither right nor straight angles are THE PLANE ANGLE . 11.
George Albert Wentworth. 63. When one straight line meets another straight line and makes the adjacent angles equal , each of these angles is called a right angle ... Angles that are neither right nor straight angles are THE PLANE ANGLE . 11.
Page 12
George Albert Wentworth. 71. Angles that are neither right nor straight angles are called oblique angles ; and ... angle AOC , and the magnitude of the angle 40C depends upon the amount of rotation of the line from the position OA to the ...
George Albert Wentworth. 71. Angles that are neither right nor straight angles are called oblique angles ; and ... angle AOC , and the magnitude of the angle 40C depends upon the amount of rotation of the line from the position OA to the ...
Page 13
... angles ; as , angles a and b , c and d ( Fig . 16 ) .. 76. Two angles are called complementary when their sum is equal to a right angle ; and each is called the complement of the other ; as angles DOB and DOC ( Fig . 17 ) . 77. Two angles ...
... angles ; as , angles a and b , c and d ( Fig . 16 ) .. 76. Two angles are called complementary when their sum is equal to a right angle ; and each is called the complement of the other ; as angles DOB and DOC ( Fig . 17 ) . 77. Two angles ...
Page 15
... straight lines ) . .. Z ACB = / DEF . 82. COR . 1. All right angles are equal . $ 47 § 60 Q. E. D. Ax . 7 83. COR . 2. At a given point in a given line there can be but one perpendicular to the line . For , if there could be two Is , we ...
... straight lines ) . .. Z ACB = / DEF . 82. COR . 1. All right angles are equal . $ 47 § 60 Q. E. D. Ax . 7 83. COR . 2. At a given point in a given line there can be but one perpendicular to the line . For , if there could be two Is , we ...
Page 16
... straight angles . 89. COR . 2. The sum of all the angles about a point in a plane , on the same side of a straight line passing through the point , is equal to a straight angle , or two right angles . PROPOSITION III . THEOREM . 90 ...
... straight angles . 89. COR . 2. The sum of all the angles about a point in a plane , on the same side of a straight line passing through the point , is equal to a straight angle , or two right angles . PROPOSITION III . THEOREM . 90 ...
Other editions - View all
Common terms and phrases
ABCD AC² adjacent angles altitude angles are equal apothem axis bisector bisects called centre chord circumference circumscribed coincide construct cylinder denote diagonals diameter dihedral angles divided Draw equiangular equidistant equilateral triangle equivalent exterior angle feet Find the area Find the locus frustum given circle given line given point given straight line greater Hence homologous homologous sides hypotenuse inches inscribed intersecting isosceles triangle lateral area lateral edges limit middle point number of sides opposite parallel lines parallelogram parallelopiped perimeter perpendicular plane MN polyhedron prism prismatoid Proof proportional prove Q. E. D. PROPOSITION quadrilateral radii radius ratio rectangle regular polygon respectively rhombus right angle right circular right triangle segments similar slant height sphere spherical square surface tangent tetrahedron THEOREM trapezoid triangle ABC triangle is equal trihedral vertex vertices
Popular passages
Page 274 - If two planes are perpendicular to each other, a straight line drawn in one of them, perpendicular to their intersection, is perpendicular to the other.
Page 50 - If the opposite sides of a quadrilateral are equal, the figure is a parallelogram.
Page 66 - 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. Given A ABC and A'B'C...
Page 41 - If two angles of a triangle are unequal, the sides opposite are unequal, and the greater side is opposite the greater angle.
Page 169 - In any triangle the product of two sides is equal to the product of the diameter of the circumscribed circle by the altitude upon the third side.
Page 360 - A sphere is a solid bounded by a surface 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 in the base of an isosceles triangle to the legs, is equal to the altitude upon one of the arms.
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 71 - The sum of the perpendiculars from any point within an equilateral triangle to the three sides is equal to the altitude of the triangle (Fig.
Page 383 - Hence the two last are right angles ; hence the arc drawn from the vertex of an isosceles spherical triangle to the middle of the base, is at right angles to the base, and bisects the vertical angle.