 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. A D A' Hyp. In triangles ABC and A'B'C', To prove AABC A A'B'C' A'B' x A'C ' Proof. Draw...  Elements of Geometry - Page 65by Adrien Marie Legendre - 1841 - 235 pagesFull view - About this book
 | Mathematics - 1835 - 684 pages
...interjacent side (c). 3. The three sides (/). 4. Two angles, and a side opposite to one of them . cor. 14 5. An angle of the one equal to an angle of the other, and the sides about two other angles, each to each, and the remaining angles of the same affection, or one of them a right... | |
 | Adrien Marie Legendre - Geometry - 1836 - 394 pages
...triangles include, by implication, those of all figures. PROPOSITION XX. THEOREM. Two triangles, which have an angle of the one equal to an angle of the other, and the sides containing those angles proportional are similar, In the two triangles ABC, DEF, let the angles A and... | |
 | Benjamin Peirce - Spherical trigonometry - 1836 - 92 pages
...the difference between DER and the sum of the other two triangles. 86. Lemma. If two triangles have an angle of the one equal to an angle of the other ; and the sides which include the angle in one triangle are supple- 1887) ments of those which include it in the other... | |
 | Benjamin Peirce - Spherical trigonometry - 1836 - 84 pages
...the difference between DER and the surn of the other two triangles. 86. Lemma. If two triangles have an angle of the one equal to an angle of the other ; and the sides which include the angle in one triangle are supplements of those which include it in the other triangle... | |
 | Benjamin Peirce - Geometry - 1837 - 216 pages
...equilateral or equiangular with respect to each other, are equivalent. 467. Lemma. If two triangles have an angle of the one equal to an angle of the other ; and the sides which include the angle in one triangle are supplements of those which include it in the other triangle... | |
 | Euclid, James Thomson - Geometry - 1837 - 410 pages
...proportional DB is found : which was to be done.* PROP. XIV. THEOR. EQUAL parallelograms which have an angle of the one equal to an angle of the other, have their sides about those angles reciprocally proportional : and (2.) parallelograms which have... | |
 | Euclides - 1840 - 192 pages
...other, have the sides about the equal angles reciprocally proportional : and, triangles which have an angle of the one equal to an angle of the other, and the sides about the equal angles reciprocally proportional, are equal. Let the triangles be so placed that the equal angles may be vertically... | |
 | Euclides - 1840 - 82 pages
...the equal angles reciprocally proportional, are equal. PROP. XV. THEOR. Equal triangles which have an angle of the one equal to an angle of the other, have the sides about the equal angles reciprocally proportional : and triangles which have an angle... | |
 | Nicholas Tillinghast - Geometry, Plane - 1844 - 108 pages
...(by -the Corollary to the last Proposition) similar. PROP. XVII. THEOREM. Two triangles, which have an angle of the one. equal to an angle of the other,...about the equal angles proportional, are similar. In the triangles ABC, DEF, let the angles, C, F,be equal, and AC : CB : : c Fig. 74. DF : FE, then... | |
 | Euclid, James Thomson - Geometry - 1845 - 382 pages
...proportional DB is found : which was to be done.* PROP. XIV. THEOR. — Equal parallelograms which have an angle of the one equal to an angle of the other, have their sides about those angles reciprocally proportional : and (2) parallelograms which have an... | |
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