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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... "
Modern Shop Practice: A General Reference Work - Page 282
1917
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Mechanical Drawing: Prepared for the Use of the Students of the ...

Linus Faunce - Mechanical drawing - 1887 - 176 pages
...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,...
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Mechanical Drawing.pbPrepared for the Use of the Students of the ...

Linus Faunce - Mechanical drawing - 1890 - 172 pages
...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,...
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Cyclopedia of Engineering; a Complete Manual of Steam and Machine ..., Volume 4

1902 - 486 pages
...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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Mechanical drawing

American School (Chicago, Ill.) - Engineering - 1903 - 416 pages
...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...
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Cyclopedia of Drawing, Volume 1

American School (Lansing, Ill.) - Architectural drawing - 1906 - 426 pages
...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...
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Modern Engineering Practice: A Reference Library..., Volume 11

American School (Chicago, Ill.) - Engineering - 1906 - 586 pages
...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....
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Cyclopedia of Drawing: A General Reference Work on Drawing and ..., Part 1

Drawing - 1906 - 424 pages
...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...
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Modern Engineering Practice: A Reference Library..., Volume 11

American School (Chicago, Ill.) - Engineering - 1906 - 580 pages
...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....
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Cyclopedia of Architecture, Carpentry and Building, Volume 6

American School (Lansing, Ill.) - Architecture - 1907 - 360 pages
...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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Cyclopedia of Civil Engineering: Plane surveying; mechanical drawing

American School of Correspondence - Civil engineering - 1908 - 474 pages
...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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