Elements of Geometry and Trigonometry: With Practical ApplicationsR.S. Davis & Company, 1862 - 490 páginas |
Dentro del libro
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Página 9
... ACUTE ANGLE is one which is less than a right angle ; as the angle DEF . B A D E 22 F E An OBTUSE ANGLE is one which is greater than a right angle ; as the angle EFG . F G Acute and obtuse angles have their sides oblique to each other ...
... ACUTE ANGLE is one which is less than a right angle ; as the angle DEF . B A D E 22 F E An OBTUSE ANGLE is one which is greater than a right angle ; as the angle EFG . F G Acute and obtuse angles have their sides oblique to each other ...
Página 11
... ACUTE - ANGLED TRIANGLE is one which has three acute angles ; as the triangles ABC and DEF , Art . 22 . An OBTUSE - ANGLED TRIANGLE is one which has an ob- tuse angle ; as the triangle GHI , Art . 22 . Acute - angled and obtuse - angled ...
... ACUTE - ANGLED TRIANGLE is one which has three acute angles ; as the triangles ABC and DEF , Art . 22 . An OBTUSE - ANGLED TRIANGLE is one which has an ob- tuse angle ; as the triangle GHI , Art . 22 . Acute - angled and obtuse - angled ...
Página 37
... acute angles . 100. Cor . 5. In a right - angled triangle the right angle is equal to the sum of the other two angles . 101. Cor . 6. Since every equilateral triangle is also equiangular ( Prop . VII . Cor . 3 ) , each of its angles ...
... acute angles . 100. Cor . 5. In a right - angled triangle the right angle is equal to the sum of the other two angles . 101. Cor . 6. Since every equilateral triangle is also equiangular ( Prop . VII . Cor . 3 ) , each of its angles ...
Página 73
... acute angle ; for it is measured by the half of the arc BOC , less than a semi - circum- ference . And every angle , BOC , inscribed in a segment less than a semicircle , is an obtuse angle ; for it is meas- ured by half of the arc BAC ...
... acute angle ; for it is measured by the half of the arc BOC , less than a semi - circum- ference . And every angle , BOC , inscribed in a segment less than a semicircle , is an obtuse angle ; for it is meas- ured by half of the arc BAC ...
Página 91
... acute angle is less than the sum of the squares of the base and the other side , by twice the rectangle contained by the base and the distance from the vertex of the acute angle to the perpendicular let fall from the vertex of the ...
... acute angle is less than the sum of the squares of the base and the other side , by twice the rectangle contained by the base and the distance from the vertex of the acute angle to the perpendicular let fall from the vertex of the ...
Otras ediciones - Ver todas
Elements of Geometry and Trigonometry: With Practical Applications Benjamin Greenleaf Vista completa - 1869 |
Elements of Geometry and Trigonometry: With Practical Applications Benjamin Greenleaf Vista completa - 1867 |
Términos y frases comunes
A B C ABCD adjacent angles altitude angle equal base bisect centre chord circle circumference circumscribed cone convex surface cosec cosine Cotang cylinder diagonal diameter distance divided drawn equal Prop equilateral triangle equivalent exterior angle feet formed frustum gles greater half the sum hence homologous hypothenuse inches included angle inscribed less Let ABC line A B logarithm logarithmic sine mean proportional measured by half multiplied number of sides parallel parallelogram parallelopipedon pendicular perimeter perpendicular polyedron prism PROBLEM PROPOSITION pyramid quadrantal radii radius ratio rectangle regular polygon right angles right-angled triangle rods Scholium secant segment side A B similar sine slant height solidity solve the triangle sphere spherical polygon spherical triangle Tang tangent THEOREM triangle ABC triangle equal trigonometric functions vertex
Pasajes populares
Página 35 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Página 57 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Página 117 - Through a given point to draw a straight line parallel to a given straight line, Let A be the given point, and BC the given straight line : it is required to draw through the point A a straight line parallel to BC.
Página 50 - If any number of magnitudes are proportional, any antecedent is to its consequent as the sum of all the antecedents is to the sum of all the consequents. Let A : B : : C : D : : E : F; then will A : B : : A + C + E : B + D + F.
Página 77 - Two rectangles having equal altitudes are to each other as their bases.
Página 158 - If a straight line is perpendicular to each of two straight lines at their point of intersection, it is perpendicular to the plane of those lines.
Página 313 - FRACTION is a negative number, and is one more tftan the number of ciphers between the decimal point and the first significant figure.
Página 314 - The logarithm of any POWER of a number is equal to the product of the logarithm of the number by the exponent of the power. For let m be any number, and take the equation (Art.
Página 100 - 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 the altitudes BD and B'D'.
Página 244 - RULE. — Multiply the base by the altitude, and the product will be the area.