Elements of Plane GeometryE.H. Butler & Company, 1882 - 196 σελίδες |
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Σελίδα 7
... meet , called Lines . It has , besides , eight sharp corners in which these lines meet , called Points . If the block be removed , we can imagine the space which it filled to have the same shape and size as the block . This limited ...
... meet , called Lines . It has , besides , eight sharp corners in which these lines meet , called Points . If the block be removed , we can imagine the space which it filled to have the same shape and size as the block . This limited ...
Σελίδα 10
... meet each other . The point in which the lines meet is called the Vertex , and the lines are called the sides of the angle . A plane angle is a species of surface . An angle is designated by placing a letter at each end of its sides ...
... meet each other . The point in which the lines meet is called the Vertex , and the lines are called the sides of the angle . A plane angle is a species of surface . An angle is designated by placing a letter at each end of its sides ...
Σελίδα 11
... meet each other so as to make the adjacent angles equal . Thus , if the angles a and b are equal , each is a right angle . 20. Perpendicular Lines are such as make right angles with each other . 21. An Acute Angle is one which is less ...
... meet each other so as to make the adjacent angles equal . Thus , if the angles a and b are equal , each is a right angle . 20. Perpendicular Lines are such as make right angles with each other . 21. An Acute Angle is one which is less ...
Σελίδα 12
... meet if sufficiently produced . 24. Two angles are complements of each other when their sum is equal to a right angle . Thus , angle a is the com- plement of angle b , and angle b is the complement of angle a . 25. Two angles are Supple ...
... meet if sufficiently produced . 24. Two angles are complements of each other when their sum is equal to a right angle . Thus , angle a is the com- plement of angle b , and angle b is the complement of angle a . 25. Two angles are Supple ...
Σελίδα 18
... meet equals two right angles . Let s a and ACD be formed by the line CD meet- ing AB . E K C a D A To prove that a + △ ACD Let and B - 2 Ls . CE be to AB at C. La + LECD = a L , α LACD L ECD = a L. Add ; then - La + L ACD = 2 Ls . ( Ax ...
... meet equals two right angles . Let s a and ACD be formed by the line CD meet- ing AB . E K C a D A To prove that a + △ ACD Let and B - 2 Ls . CE be to AB at C. La + LECD = a L , α LACD L ECD = a L. Add ; then - La + L ACD = 2 Ls . ( Ax ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
AB² ABC and DEF AC and BC acute angle adjacent angles angles are equal angles equals angles formed arc AC BC² bisectors bisects centre CF meet chord common point Concave Polygon construct Convex Polygon COR.-The decagon DEF are similar diagonal BC diameter Draw the diagonal equally distant equals two right equiangular Equilateral Polygon exterior angles given circle given straight line homologous sides hypothenuse included angle intersect La=Lb Let ABCD line joining lines drawn measured by arc medial lines middle point oblique lines parallelogram perimeter PLANE GEOMETRY produced proportion Q. E. D. THEOREM Q. E. F. PROBLEM quadrilateral radii radius rectangle regular inscribed regular polygon respectively equal rhombus right angles right-angled triangle SCHOLIUM secant similar polygons square Subtract tangent third side trapezoid triangles are equal vertex vertical angle
Δημοφιλή αποσπάσματα
Σελίδα 14 - Things which are equal to the same thing, are equal to each other. 2. If equals are added to equals, the sums are equal. 3. If equals are subtracted from equals, the remainders are equal. 4. If equals are added to unequals, the sums are unequal.
Σελίδα 83 - In a series of equal ratios, the sum of the antecedents is to the sum of the consequents as any antecedent is to its consequent.
Σελίδα 85 - CIRCLE is a plane figure bounded by a curved line, all the points of which are equally distant from a point within called the centre; as the figure ADB E.
Σελίδα 44 - If two triangles have two sides of the one respectively equal to two sides of the other, and the included angles unequal, the triangle which has the greater included angle has the greater third side.
Σελίδα 14 - Axioms. 1. Things which are equal to the same thing are equal to each other. 2. If equals are added to equals, the wholes are equal. 3. If equals are taken from equals, the remainders are equal.
Σελίδα 136 - 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 123 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Σελίδα 55 - A polygon of three sides is a triangle ; of four, a quadrilateral; of five, a pentagon ; of six, a hexagon ; of seven, a heptagon; of eight, an octagon; of nine, a nonagon; of ten, a decagon; of twelve, a dodecagon.
Σελίδα 137 - 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 177 - From this proposition it is evident, that the square described on the difference of two lines is equivalent to the sum of the squares described on the lines respectively, minus twice the rectangle contained by the lines.