Elementary Mathematics: Embracing Arithmetic Geometry, and Algebra1873 |
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Side 66
... right angles are such that if one be placed adjacent and exterior to another , and one straight line of the one ... right angles to another , when the angles formed at the point of intersection are right angles . 11. An acute angle is a ...
... right angles are such that if one be placed adjacent and exterior to another , and one straight line of the one ... right angles to another , when the angles formed at the point of intersection are right angles . 11. An acute angle is a ...
Side 67
... right angle . 23. An acute angled triangle has all its angles acute . 24. An obtuse angled triangle contains an obtuse angle . Quadrilateral Figures . 25. A square has its sides equal , and its angles right angles . 26. A rhombus has ...
... right angle . 23. An acute angled triangle has all its angles acute . 24. An obtuse angled triangle contains an obtuse angle . Quadrilateral Figures . 25. A square has its sides equal , and its angles right angles . 26. A rhombus has ...
Side 68
Lewis Sergeant. 28. A rhomboid has its opposite sides equal , but its angles are not right angles . Parallels . 29. Parallel straight lines are those which never meet , though produced continually in both directions . 30. A parallelogram ...
Lewis Sergeant. 28. A rhomboid has its opposite sides equal , but its angles are not right angles . Parallels . 29. Parallel straight lines are those which never meet , though produced continually in both directions . 30. A parallelogram ...
Side 69
... right angles are equal to each other . ) Further Explanation of Terms , & c . The first stage of Elementary Geometry of two dimen- sions , treated of in this book , embraces theorems and problems on the properties of straight lines and ...
... right angles are equal to each other . ) Further Explanation of Terms , & c . The first stage of Elementary Geometry of two dimen- sions , treated of in this book , embraces theorems and problems on the properties of straight lines and ...
Side 70
Lewis Sergeant. ( 4. ) On a certain property of right - angled triangles , and its converse . It is not possible to preserve this exact order of classifi- cation in the arrangement of the propositions ; thus , for instance , we cannot ...
Lewis Sergeant. ( 4. ) On a certain property of right - angled triangles , and its converse . It is not possible to preserve this exact order of classifi- cation in the arrangement of the propositions ; thus , for instance , we cannot ...
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Vanlige uttrykk og setninger
16 Maps a²b ab² ABCD ACD is greater Algebra angle ACB angle equal Arith arithmetical ATLAS base bisect called cent centimes cloth lettered co-efficient concrete quantities decimal fraction denominator digits divide dividend divisor draw a circle equal and parallel equations example expression exterior angle fore four right angles Geometry given straight line gram greater than AC Hence inches inner angles isosceles least common multiple measure metres metrical system mixed number Multiply opposite parallel straight lines parallel to BD parallelogram parallels are equal produced Proposition quotient radius ratio rectilinear recurring decimal remainder result right angles right angles Prop square subtract triangle ABC triangles are equal unit vulgar fraction whole number
Populære avsnitt
Side 85 - If a side of any triangle be produced, the exterior angle is equal to the, two interior and opposite angles ; and the three interior angles of every triangle are equal to two right angles.
Side 110 - If two triangles have two sides of the one equal to two sides of the other...
Side 105 - If one side of a triangle be produced, the exterior angle is greater than either of the interior, and opposite angles.
Side 83 - If a straight line fall on two parallel straight lines, it makes the alternate angles equal to one another, and the exterior angle equal to the interior and opposite angle on the same side; and also the two interior angles on the same side together equal to two right angles.