 | Linus Faunce - 1887 - 176 σελίδες
...less than a right angle. An obtuse angle is more than a right angle. A quadrant is an arc of 90°. A plane figure is a plane bounded on all sides by lines. If the lines are straight, the space which they contain is called a rectilinear figure or polygon,... | |
 | Linus Faunce - 1890 - 172 σελίδες
...less than a right angle. An obtuse angle is more than a right angle. A quadrant is an arc of 90°. A plane figure is a plane bounded on all sides by lines. If the lines are straight, the space which they contain is called a rectilinear figure or polygon,... | |
 | 1902 - 486 σελίδες
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line; it has two dimensions, — length and breadth....lines) is called a polygon or a rectilinear figure. TRIANGLES. A triangle is a figure enclosed by three straight lines. It is a polygon of three sides.... | |
 | American School (Chicago, Ill.) - 1903 - 414 σελίδες
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line ; it has two dimensions, — length and breadth....straight lines) is called a polygon or a rectilinear fignre. TRIANGLES. A triangle is a figure enclosed by three straight lines. It is a polygon of three... | |
 | American School (Lansing, Ill.) - 1906 - 426 σελίδες
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced hy the motion of a line; it has two dimensions, — length and breadth....straight lines) is called a polygon or a rectilinear fyure. TRIANGLES. A triangle is a figure enclosed by three straight lines. It is a polygon of three... | |
 | American School (Chicago, Ill.) - 1906 - 586 σελίδες
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line ; it has two dimensions, — length and breadth....these lines (if they are straight lines) is called a polggon or a rectilinear figure. TRIANGLES. A triangle is a figure enclosed by three straight lines.... | |
 | 1906 - 424 σελίδες
...right angle. SURFACES. A surface is produced by the motion of a line; it has two dimensions,—length and breadth. A plane figure is a plane bounded on...they are straight lines) is called a polygon or a rcctilinear ju/urc. TRIANGLES. A triangle is a figure enclosed by three straight lines. It is a polygon... | |
 | American School (Chicago, Ill.) - 1906 - 580 σελίδες
...line; it has two dimensions, — length and hreadth. A plane figure is a plane bounded on all sides hy lines; the space included within these lines (if they...lines) is called a polygon or a rectilinear figure. TRIANGLES. A triangle is a figure enclosed by three straight lines. It is a polygon of three sides.... | |
 | American School (Lansing, Ill.) - 1907 - 360 σελίδες
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line; it has two dimensions, — length and breadth....lines) is called a polygon or a rectilinear figure. TRIANGLES. A triangle is a figure enclosed by three straight lines. It is a polygon of three sides.... | |
 | American School of Correspondence - 1908 - 474 σελίδες
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line; it has two dimensions, — length and breadth....lines) is called a polygon or a rectilinear figure. TRIANGLES. A triangle is a figure enclosed by three straight lines. It is a polygon of three sides.... | |
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... angles thus formed are equal they are right angles. When two lines are perpendicular to each other the angles formed are right angles. An acute angle is less than a right angle. An obtuse angle is greater than a right angle. SURFACES. A surface is... 
