An Elementary Course of Plane GeometryThomas Murby, 1868 - 261 páginas |
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Página 16
... sides of the axis of symmetry are equal , for they coincide . The midrib of ... side of the drawing board , and also as a carpenter's square . Fig . 28 . The ... number of distinct lines may be drawn , but only one of these has sus- the ...
... sides of the axis of symmetry are equal , for they coincide . The midrib of ... side of the drawing board , and also as a carpenter's square . Fig . 28 . The ... number of distinct lines may be drawn , but only one of these has sus- the ...
Página 23
... sides of the given angle , and the blade is opened or shut until its edge ... sides of the cupboard is first measured by the instrument , and the shelf cut to ... number of straight lines that meet in a point , are together equal to four ...
... sides of the given angle , and the blade is opened or shut until its edge ... sides of the cupboard is first measured by the instrument , and the shelf cut to ... number of straight lines that meet in a point , are together equal to four ...
Página 35
... sides of the angle , is an arc of 90 ° . It is called a quadrant . If , with the apex of an angle as centre , and any radius , an arc be described meeting the sides , we may consider the number of degrees in the arc as a measure of the ...
... sides of the angle , is an arc of 90 ° . It is called a quadrant . If , with the apex of an angle as centre , and any radius , an arc be described meeting the sides , we may consider the number of degrees in the arc as a measure of the ...
Página 40
... number of degrees in any arc described with the apex as centre , and included between its sides . " Explain this statement , and prove that it is true . 7. Describe the protractor , and show how it may be used— Ist . To measure an arc ...
... number of degrees in any arc described with the apex as centre , and included between its sides . " Explain this statement , and prove that it is true . 7. Describe the protractor , and show how it may be used— Ist . To measure an arc ...
Página 41
... number of straight lines meet in a point and include equal angles , each angle being 13 ° 20 ′ ; how many angles are ... sides of the triangle ( fig . 61 ) . The sides of a triangle form three angles at the points of inter- section . B ...
... number of straight lines meet in a point and include equal angles , each angle being 13 ° 20 ′ ; how many angles are ... sides of the triangle ( fig . 61 ) . The sides of a triangle form three angles at the points of inter- section . B ...
Otras ediciones - Ver todas
An Elementary Course of Plane Geometry and Mensuration Richard Wormell Sin vista previa disponible - 2015 |
Términos y frases comunes
A B C adjacent angles alternate angles angle equal angular points apex base bisecting centre centre of symmetry chord circumscribed coincide compasses construction decagon describe a circle describe a circumference diagonals diameter dicular distance divide dodecagon draw a straight equilateral triangle extremities figure Find the area Geometry given angle given circle given point given polygon given radius given straight line height Hence hexagon hypothenuse inscribed angle instrument intercepted isosceles triangle line drawn line joining line parallel measure middle point number of sides opposite angles opposite sides parallel lines parallel straight lines parallelogram pentagon perimeter perpen perpendicular plane point of contact point of intersection proportional Prove quadrilateral radii ratio rectangle regular polygon respectively equal rhombus right-angled triangle ruler secant segments similar similar triangles square straight line A B symmetrical axis tangent touch vertical
Pasajes populares
Página 55 - ... parallel to the first. 75. No two straight lines drawn from the extremities of the base of a triangle to the opposite sides can possibly bisect each other. 76. If the opposite sides of a quadrilateral are equal it is a parallelogram. 77. If the opposite angles of a quadrilateral are equal it is a parallelogram. 78. The diagonals of a parallelogram bisect each other. 79. If the diagonals of a quadrilateral bisect each other it is a parallelogram. 80. If the straight line joining two opposite angles...
Página 151 - Describe a circle which shall pass through two given points, and have its centre in a given line.
Página 66 - If two parallel lines are cut by a third straight line, the sum of the two interior angles on the same side of the transversal is equal to two right angles, (p.
Página 90 - There are two columns in the ruins of Persepolis, left standing upright ; one is 70 feet above the plane, and the other 50...
Página 5 - I., 5), (3) that, if two straight lines cut one another, the vertically opposite angles are equal (Eucl.
Página 77 - The square of the sum of two numbers is equal to the square of the first, plus twice the product of the first and the second, plus the square of the second.
Página 90 - May-pole, whose top was broken off" by a blast of wind, struck the ground at the distance of 15 feet from the foot of the pole ; what was the height of the whole May-pole, supposing the length of the broken piece to be 39 feet ?
Página 44 - S.SO. 1. Prove that, if two sides of a triangle are unequal, the angle opposite the greater side is greater than the angle opposite the less.