The Elements of Euclid, containing the first six books, with a selection of geometrical problems. To which is added the parts of the eleventh and twelfth books which are usually read at the universities. By J. Martin |
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Σελίδα 161
Ratio is a mutual relation of two magnitudes of the same kind to one another , in respect of quantity . " 4 . Magnitudes are said to have a ratio to one another , when the less can be multiplied so as to exceed the other . 5 .
Ratio is a mutual relation of two magnitudes of the same kind to one another , in respect of quantity . " 4 . Magnitudes are said to have a ratio to one another , when the less can be multiplied so as to exceed the other . 5 .
Σελίδα 163
This word is used when there are four proportionals , and it is inferred that the first has the same ratio to the third which the second has to the fourth ; or that the first is to the third as the second to the fourth ; as is shown in ...
This word is used when there are four proportionals , and it is inferred that the first has the same ratio to the third which the second has to the fourth ; or that the first is to the third as the second to the fourth ; as is shown in ...
Σελίδα 174
Equal magnitudes have the same ratio to the same magnitude ; and the same has the same ratio to equal magnitudes . Let A and B be equal magnitudes , and C any other . Then A and B shall each of them have the same ratio to C ; and C ...
Equal magnitudes have the same ratio to the same magnitude ; and the same has the same ratio to equal magnitudes . Let A and B be equal magnitudes , and C any other . Then A and B shall each of them have the same ratio to C ; and C ...
Σελίδα 175
Of two unequal magnitudes , the greater has a greater ratio to any other magnitude than the less has ; and the same magnitude has a greater ratio to the less of two other magnitudes , than it has to the greater .
Of two unequal magnitudes , the greater has a greater ratio to any other magnitude than the less has ; and the same magnitude has a greater ratio to the less of two other magnitudes , than it has to the greater .
Σελίδα 177
Let C have the same ratio to each of the magnitudes A and B. Then A shall be equal to B. Construction . For , if they are not equal , one of them must be greater than the other ; let A be the greater ; therefore , as was shown in Prop .
Let C have the same ratio to each of the magnitudes A and B. Then A shall be equal to B. Construction . For , if they are not equal , one of them must be greater than the other ; let A be the greater ; therefore , as was shown in Prop .
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The Elements of Euclid, Containing the First Six Books, with a Selection of ... Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD AC is equal alternate angle ABC angle ACB angle BAC base base BC bisected centre circle ABC circumference common compounded constr Construction Demonstration describe diameter divided double draw equal angles equiangular equimultiples exterior angle extremities fall fore four fourth given point given straight line greater half inscribed interior join less Let ABC likewise magnitudes manner meet multiple opposite angle parallel parallelogram pass perpendicular plane polygon produced Proof proportionals proved Q.E.D. PROPOSITION ratio reason rectangle contained rectilineal figure remaining angle right angles segment shown sides similar square square on AC straight line BC taken third touches the circle triangle ABC unequal wherefore whole
Δημοφιλή αποσπάσματα
Σελίδα 1 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Σελίδα 6 - If a straight line meets two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...
Σελίδα 232 - If two triangles, which have two sides of the one proportional to two sides of the other, be joined at one angle, so as to have their homologous sides parallel to one another, the remaining sides shall be in a straight line. Let...
Σελίδα 112 - The angle in a semicircle is a right angle; the angle in a segment greater than a semicircle is less than a right angle; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 209 - ... triangles which have one angle in the one equal to one angle in the other, and their sides about the equal angles reciprocally proportional, are equal to one another.
Σελίδα 269 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Σελίδα 199 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Σελίδα 23 - If two triangles have two angles of the one equal to two angles of the other, each to each, and also one side of the one equal to the corresponding side of the other, the triangles are congruent.
Σελίδα 63 - If a straight line be divided into two equal, and also into two unequal parts, the squares on the two unequal parts are together double of the square on half the line and of the square on the line between the points of section. Let the straight line AB be divided into two equal parts...
Σελίδα 32 - ... twice as many right angles as the figure has sides ; therefore all the angles of the figure together with four right angles, are equal to twice as many right angles as the figure has sides.