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In order to obtain accurate measurements each degree is divided into 60 equal parts called minutes and each minute is divided into 60 equal parts called seconds.
Arithmetic by Grades for Inductive Teaching, Drilling and Testing..: Book no ... - Σελίδα 81
των John Tilden Prince - 1894
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Cyclopedia of Drawing, Τόμος 1

...degrees, which means that it is •£fa = I of a circumference. In order to obtain accurate measurements each degree is divided into 60 equal parts called minutes and each minute is divided into 6O equal parts called seconds. Angles and arcs are usually measured by means of an instrument called...

Cyclopedia of Civil Engineering: Plane surveying; mechanical drawing

1908
...•gfa = | of a circumference. In order to obtain accurate measurements each degree is divided into GO equal parts called minutes and each minute is divided into 60 equal parts called seconds. Angles and arcs are usually measured by means of an instrument called a protractor which has already...

Plane Trigonometry

Levi Leonard Conant - 1909 - 183 σελίδες
...unit of measure is the right angle. The right angle is divided into 90 equal parts, called degrees; each degree is divided into 60 equal parts, called...minute is divided into 60 equal parts, called seconds. The symbols 1°, 1', 1", are employed to denote one degree, one minute, and one second respectively....

Cyclopedia of Civil Engineering: A General Reference Work on Surveying ...

...degrees, which means that it is ^fo = ^ of a circumference. In order to obtain accurate measurements each degree is divided into 60 equal parts called...minute is divided into 60 equal parts called seconds. Angles and 180 arcs are usually measured by means of an instrument called a protractor which has already...

Plane and Spherical Trigonometry

Levi Leonard Conant - 1909 - 222 σελίδες
...unit of measure is the right angle. The right angle is divided into 90 equal parts, called degrees; each degree is divided into 60 equal parts, called...minute is divided into 60 equal parts, called seconds. The symbols 1°, 1', 1", are employed to denote one degree, one minute, and one second respectively....

Cyclopedia of Architecture, Carpentry and Building: Mechanical drawing ...

1909
...5^ = J of a circumference. In older to obtain accurate measurements each degree is divided into GO equal parts called minutes and each minute is divided into 60 equal parts called seconds. Angles and arcs are usually measured by means of an instrument called a protractor which has already...

Cyclopedia of Carpentry and Contracting ...: Architectural drawing ...

1910
...degrees, which means that it is •j^j- = | of a circumference. In order to obtain accurate measurements each degree is divided into 60 equal parts called...minute is divided into 60 equal parts called seconds. Angles and arcs are usually measured by means of an instrument called a protractor which has already...