| Joseph Hughes - 1883
...inclination of two lines to one another in » plane which meet together, but are not in the same direction. **A figure is that which is enclosed by one or more boundaries.** A square is a four-sided figure having all its sides equal, and »И its angles right angles. A parallelogram... | |
| Mathematical association - 1883
...15. A perpendicular to a straight line is a straight line that makes a right angle with it. DEF. 16. **An acute angle is that which is less than a right angle.** DEF. 17. An obtuse angle is that which is greater than one right angle, but less than two right angles.... | |
| 1883
...inclination of two lines to one another in » plane which meet together, but are not in the same direction. **A figure is that which is enclosed by one or more boundaries.** A square is a four-sided figure having all its sides equal, and ill its angles right angles. A parallelogram... | |
| Mathematical association - 1884
...perpendicular to a straight line is a straight line that makes a right angle with it. C 18 DEF. 1 2. **An acute angle is that which is less than a right angle.** DEF. 13. An obtuse angle is that which is greater than one right angle, but less than two right angles.... | |
| Association for the improvement of geometrical teaching - 1884
...n. A perpendicular to a straight line is a straight line that makes a right angle with it. DEF. 1 2. **An acute angle is that which is less than a right angle.** DEF. 13. An obtuse angle is that which is greater than one right angle, but less than two right angles.... | |
| Stephen Hawtrey - 1884 - 155 pągines
...following definitions: Definition 13.—A term or boundary is the extremity of anything. Definition 14.—A **figure is that which is enclosed by one or more boundaries. The** ' figure' so introduced is the Circle, which is thus defined: Definition 15.—A circle is a plane... | |
| Euclides - 1884
...called a perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. 12. **An acute angle is that which is less than a right angle.** 'Adjacent' means lying next to, from the Latin ad, to, and/awo, I lie. Adjacent angles have one of... | |
| Stewart W. and co - 1884
...acute angle if less than a right angle. XIII. A term or boundary is the extremity of anything. XIV. **A figure is that which is enclosed by one or more boundaries.** XV. A circle is a plane figure contained by one line, called the circumference, such that all straight... | |
| Euclides - 1884
...called a perpendicular to it. XL An obtuse angle is that which is greater than a right angle. XII. **An acute angle is that which is less than a right angle.** XIII. A term or boundary, is the extremity of anything. XIV. A figure is that which is enclosed by... | |
| Edward Mann Langley, W. Seys Phillips - 1890 - 515 pągines
...called a Perpendicular to it. 11. An Obtuse Angle is that which is greater than a right angle. 12. **An Acute Angle is that which is less than a right angle.** 13. A Term or Boundary is the extremity of anything. 14. A Figure is that which is inclosed by one... | |
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