Elements of Geometry: With, Practical ApplicationsD. Appleton and Company, 1850 - 320 páginas |
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Página 14
... equilateral triangle ; one having two sides equal , is called an isosceles triangle ; and one having no two sides equal , is called a scalene triangle . Δ Δ Δ XVI . A triangle having a right - an- gle 14 ELEMENTS OF GEOMETRY .
... equilateral triangle ; one having two sides equal , is called an isosceles triangle ; and one having no two sides equal , is called a scalene triangle . Δ Δ Δ XVI . A triangle having a right - an- gle 14 ELEMENTS OF GEOMETRY .
Página 26
... A. Cor . 1. Hence the line which bisects the vertical angle of an isosceles triangle , bisects the base , and is also perpendicular to it . Cor . 2. It also appears that every equilateral triangle 26 ELEMENTS OF GEOMETRY .
... A. Cor . 1. Hence the line which bisects the vertical angle of an isosceles triangle , bisects the base , and is also perpendicular to it . Cor . 2. It also appears that every equilateral triangle 26 ELEMENTS OF GEOMETRY .
Página 27
... equilateral triangle is equiangular , or has all its angles equal . PROPOSITION VI . THEOREM . When one side of a triangle is produced , the exterior angle is greater than either of the two interior and opposite angles . Let ABC be a ...
... equilateral triangle is equiangular , or has all its angles equal . PROPOSITION VI . THEOREM . When one side of a triangle is produced , the exterior angle is greater than either of the two interior and opposite angles . Let ABC be a ...
Página 30
... equilateral triangles be constructed externally to the given triangle , then will the straight lines drawn from the vertices of the equilateral trian- gles to the opposite angles of the given triangle be equal . Let ABC be the given ...
... equilateral triangles be constructed externally to the given triangle , then will the straight lines drawn from the vertices of the equilateral trian- gles to the opposite angles of the given triangle be equal . Let ABC be the given ...
Página 31
... equilateral triangles ADB , BFC , CGA , are described ; then will the lines DC , FA , GB , be equal . Comparing the two triangles ABF , DBC , we have AB = DB ; BF = BC , being sides of equilateral triangles . The angles CBF , ABD are ...
... equilateral triangles ADB , BFC , CGA , are described ; then will the lines DC , FA , GB , be equal . Comparing the two triangles ABF , DBC , we have AB = DB ; BF = BC , being sides of equilateral triangles . The angles CBF , ABD are ...
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Términos y frases comunes
a+b+c altitude angle ABC angle BAC angle BCD bisect centre chord circ circular sector circumference circumscribed polygon coincide cone consequently convex surface cylinder denote diagonal diameter dicular distance draw equal and parallel equiangular equilateral triangle equivalent exterior angle figure formed given line greater half the arc hypothenuse inscribed circle intersection isosceles join less Let ABC line AC line CD lines drawn measured by half meet multiplied number of sides parallel planes parallelogram parallelopipedon pendicular perimeter perpen perpendicular plane MN point G prism PROBLEM produced Prop PROPOSITION pyramid radii radius rectangle regular polygon respectively equal right-angled triangle Sabc Schol Scholium scribed semicircle semicircumference side AC similar similar triangles solid angle sphere spherical triangle square straight line suppose tangent THEOREM three sides triangle ABC triangular prism vertex VIII
Pasajes populares
Página 231 - THE sphere is a solid terminated by a curve surface, all the points of which are equally distant from a point within, called the centre.
Página 147 - PROBLEM. To inscribe a circle in a given triangle. Let ABC be the given triangle : it is required to inscribe a circle in the triangle ABC.
Página 17 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.
Página 28 - If two sides and the included angle of the one are respectively equal to two sides and the included angle of the other...
Página 233 - The volume of a cylinder is equal to the product of its base by its altitude. Let the volume of the cylinder be denoted by V, its base by B, and its altitude by H.
Página 276 - THEOREM. Two triangles on the same sphere, or on equal spheres, are equal in all their parts, when they have each an equal angle included between equal sides. Suppose the side...
Página 120 - 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. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Página 18 - If equals be added to unequals, the wholes are unequal. V. If equals be taken from unequals, the remainders are unequal. VI. Things which are double of the same, are equal to one another.
Página 232 - A spherical triangle is a portion of the surface of a sphere, bounded by three arcs of great circles.
Página 96 - Similar figures, are those that have all the angles of the one equal to all the angles of the other, each to each, and the sides about the equal angles proportional.