Manual of Plane Geometry, on the Heuristic Plan: With Numerous Extra Exercises, Both Theorems and Problems, for Advance WorkD.C. Health, 1891 - 179 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 21.
Σελίδα 7
... intersect in only one point . XVII . In one direction from a point only one straight line can be drawn ; or if more be drawn , they must coincide , XVIII . Through a given point ( as P ) only one line A ( as AB ) can be drawn par- allel ...
... intersect in only one point . XVII . In one direction from a point only one straight line can be drawn ; or if more be drawn , they must coincide , XVIII . Through a given point ( as P ) only one line A ( as AB ) can be drawn par- allel ...
Σελίδα 12
... :: ZACD = LBCH . ( Axiom VII . ) Q.E.D. The pupil should now employ a similar method and demon- strate ( II . ) and the following easy ones : 57. If two straight lines intersect each other , the 12 PLANE GEOMETRY . THEOREMS.
... :: ZACD = LBCH . ( Axiom VII . ) Q.E.D. The pupil should now employ a similar method and demon- strate ( II . ) and the following easy ones : 57. If two straight lines intersect each other , the 12 PLANE GEOMETRY . THEOREMS.
Σελίδα 13
... intersect each other , the sum of the four angles thus formed equals four right angles . 58. The sum of all the angles ... intersection of two straight lines is a right angle , the other three angles åre also right angles . 61. All right ...
... intersect each other , the sum of the four angles thus formed equals four right angles . 58. The sum of all the angles ... intersection of two straight lines is a right angle , the other three angles åre also right angles . 61. All right ...
Σελίδα 32
... intersection of two of the bisectors draw a line to the other vertex , and also perpendiculars to the three sides . Prove the former a bisector by means of equality of triangles . 126. The perpendiculars which bisect the three sides of ...
... intersection of two of the bisectors draw a line to the other vertex , and also perpendiculars to the three sides . Prove the former a bisector by means of equality of triangles . 126. The perpendiculars which bisect the three sides of ...
Σελίδα 36
... intersection of the two medians . By extending the first line and connecting certain points a parallelogram may be ... intersect at the same point . Sug . Consult 151 and 149 . 166. The diagonals of an isosceles trapezoid are equal . 167 ...
... intersection of the two medians . By extending the first line and connecting certain points a parallelogram may be ... intersect at the same point . Sug . Consult 151 and 149 . 166. The diagonals of an isosceles trapezoid are equal . 167 ...
Άλλες εκδόσεις - Προβολή όλων
Manual of Plane Geometry, on the Heuristic Plan: With Numerous Extra ... George Irving Hopkins Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2008 |
Συχνά εμφανιζόμενοι όροι και φράσεις
acute angle adjacent angles angle formed apothegm Arc HK base and altitude bisect bisector called central angle centre centre of symmetry chord circumference Compute the area construct the triangle Consult Theorem decagon demonstration diagonals diameter difference distance divide a given equal circles equally distant equiangular equiangular polygon equilateral polygons exterior extremity feet form a proportion geometrical given circle given line given parallelogram given point given triangle Hence homologous sides hypothenuse inches intercepted interior angles isosceles trapezoid isosceles triangle line be drawn lines drawn magnitudes middle point number of sides one-half opposite perimeter perpendicular point of contact point selected Post prove pupil quadrilateral radii radius ratio rectangle regular polygon relation required to construct required to divide required to find rhombus right angle right triangle secant segments selected at random symmetry tangent transversal trapezoid unequal vertex vertical angle
Δημοφιλή αποσπάσματα
Σελίδα 38 - PERIPHERY of a circle is its entire bounding line ; or it is a curved line, all points of which are equally distant from a point within called the centre.
Σελίδα 78 - In any triangle, the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides, minus twice the product of one of these sides and the projection of the other side upon it.
Σελίδα 80 - In any triangle, the product of any two sides is equal to the product of the segments of the third side formed by the bisector of the opposite angle, plus the square of the bisector.
Σελίδα 3 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Σελίδα 71 - A Polygon of three sides is called a triangle ; one of four sides, a quadrilateral; one of five sides, a pentagon; one of six sides, a hexagon; one of seven sides, a heptagon; one of eight sides, an octagon ; one of ten sides, a decagon ; one of twelve sides, a dodecagon, &c.
Σελίδα 25 - In a right triangle, the side opposite the right angle is called the hypotenuse and is the longest side.
Σελίδα 80 - In any quadrilateral, the sum of the squares of the four sides is equal to the sum of the squares of the diagonals plus four times the square of the line joining the middle points of the diagonals.
Σελίδα 79 - In any triangle the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of those sides and the projection of the other upon that side.
Σελίδα 70 - Sines that the bisector of an angle of a triangle divides the opposite side into parts proportional to the adjacent sides.
Σελίδα 72 - The sum of the interior angles of a polygon is equal to two right angles, taken as many times less two as the figure has sides.