Manual of Plane Geometry, on the Heuristic Plan: With Numerous Extra Exercises, Both Theorems and Problems, for Advance WorkD.C. Health, 1891 - 179 σελίδες |
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Σελίδα iii
... number of teachers who are getting more and more dissatisfied with the old methods of teaching geometry , but who have hitherto found no ... side issues , so to speak , but are required of the pupil in that sequence of theorems and problems ...
... number of teachers who are getting more and more dissatisfied with the old methods of teaching geometry , but who have hitherto found no ... side issues , so to speak , but are required of the pupil in that sequence of theorems and problems ...
Σελίδα 3
... angles have the same vertex and the sides of one are the extensions of the sides of the other , they are called vertical angles . 21. An angle is named by a letter or number placed at its vertex . If , however , there are two or more angles ...
... angles have the same vertex and the sides of one are the extensions of the sides of the other , they are called vertical angles . 21. An angle is named by a letter or number placed at its vertex . If , however , there are two or more angles ...
Σελίδα 5
... sides in direction , two and two , the angles must be equal . 36. Conversely , if two equal angles be conceived to ... number is to add it to itself the required number of times . ( See above . ) To divide a line by a number is to ...
... sides in direction , two and two , the angles must be equal . 36. Conversely , if two equal angles be conceived to ... number is to add it to itself the required number of times . ( See above . ) To divide a line by a number is to ...
Σελίδα 13
... angles thus formed equals four right angles . 58. The sum of all the angles formed at one point on the same side of a straight line equals two right angles . 59. The sum of all the angles formed by any number of straight lines meeting ...
... angles thus formed equals four right angles . 58. The sum of all the angles formed at one point on the same side of a straight line equals two right angles . 59. The sum of all the angles formed by any number of straight lines meeting ...
Σελίδα 16
... How many degrees in all the angles formed at one point on one side of a straight line ? How many grades ? How many grades in all the angles formed by any number of straight lines meeting at a common point ? degrees ? How many What is ...
... How many degrees in all the angles formed at one point on one side of a straight line ? How many grades ? How many grades in all the angles formed by any number of straight lines meeting at a common point ? degrees ? How many What is ...
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.