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12 feet 9 inches ABCD adjacent sides altitude angle ABC angle AOB angle subtended arc equal area of ABC area of triangle axis base multiplied centre chord circle whose radius circular measure circular segment circumference circumscribing circle cube cubic feet cylinder diagonal divide edge equilateral triangle Euclid Exercises feet 6 inches feet 9 find the area find the diameter find the length Find the number Find the radius find the side find the surface Find the volume foot 9 frustum generatrix half the sum hypothenuse inscribed circle Js(s lateral surface lune number of sides parallel parallelogram perimeter perpendicular height plane prism Prop radii ratio rectangle rectangular parallelopiped regular polygon revolving round right angle right circular cone right.angled triangle ring segment shew similar triangle slant height square feet square inches square yards surface of sphere total surface trapezoid triangle ABC triangular prism triangular pyramid vertex
Pagina 1 - The area of the surface generated by a straight line revolving about an axis in its plane, is equal to the projection of the line on the axis multiplied by the circumference of the circle whose radius is the perpendicular erected at the middle of the line and terminated by the axis.
Pagina 37 - A Cylindrical surface is a curved surface generated by a moving straight line which continually touches a given curve and in all its positions is parallel to a given fixed straight line not in the plane of the curve.
Pagina 42 - A conical surface is a curved surface generated by a moving straight line which continually touches a given curve, and passes through a given fixed point not in the plane of the curve. Thus, if the straight line...
Pagina 46 - A sphere is a solid bounded by a surface all points of which are equally distant from a point within called the centre.
Pagina 97 - From this it readily follows that all the three lines drawn from the angles of a triangle to the middle of the opposite sides, pass through one and the same point.
Pagina 46 - The axis of a circle of a sphere is the diameter of the sphere which is perpendicular to the plane of the circle. The ends of the axis are called the poles of the circle.
Pagina 98 - The area of a regular inscribed hexagon is a mean proportional between the areas of the inscribed and circumscribed equilateral triangles.