First Steps in Geometry |
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ABCD Fig acute angle altitude axis bi-symmetric figure bisect centre chains chord circumference cm long cone of revolution construct a square cube curved cylinder Describe a circle diameter distance divided Draw a straight drawn ellipse equal arcs equal bases equilateral triangle Find the area Find the value frustum geometric given point given straight line homologous sides horizontal hypotenuse inscribed inscribed angle intersect isosceles trapezoid isosceles triangle lateral edges lateral faces lateral surface legs measure miles paper parabola parallel lines parallel perspective parallelogram parallelopiped perimeter perpendicular plane figure plane surface Problem protractor Put in parallel quadrilateral radii radius ratio rectangle regular hexagon regular polygon regular pyramid respect revolving rhombus right angles right triangle ruler sector shape shown in Fig similar triangles slant height sphere square pyramid symmetry tangent theorem triangle ABC triangular prism units of length vertex vertical
Popular passages
Page 42 - An angle less than a right angle is called an acute angle; an angle greater than a right angle and less than two right angles is called an obtuse angle.
Page 146 - THEOREM. Every section of a sphere, made by a plane, is a circle.
Page 111 - Four quantities are in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth.
Page 63 - Two triangles are congruent if two angles and the included side of one are equal respectively to two angles and the included side of the other.
Page 63 - Two triangles are congruent if two sides and the included angle of one are equal respectively to two sides and the included angle of the other.
Page 104 - The square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
Page 62 - The angles opposite the equal sides of an isosceles triangle are equal.
Page 122 - The areas of two similar triangles are to each other as the squares of any two homologous sides.
Page 31 - Circle is a plane figure bounded by a curved line called a circumference, every point of which is equally distant from a point within called the centre.
Page 96 - The area of a rectangle is found by multiplying the number of units in the length by the number of like units in the width.