 | George Roberts Perkins - 1856 - 460 páginas
...circumference. The portion of the plane limited by this circumference is called a circle. Any portion of the circumference of a circle is called an arc. When the arc is equal to one-fourth of the circumference it is called a quadrant. Each of the straight lines... | |
 | George Roberts Perkins - 1860 - 472 páginas
...circumference. The portion of the plane limited by this circumference is called a circle. Any portion of the circumference of a circle is called an arc. When the arc is equal to one-fourth of the circumference it is called a quadrant. Each of the straight lines... | |
 | William George Spencer - 1876 - 118 páginas
...write on each its name. 23. Can you place two circles to touch each other at y particular point ? 24. Can you place three circles in a row, and let each...called an arc. When the circumference of a circle is di vided into two equal arcs, each arc is called a semi-circumference. All arcs of circles that are... | |
 | William George Spencer - 1877 - 108 páginas
...write on each its name. 23. Can you place two circles to touch each other at a particular point ? 24. Can you place three circles in a row, and let each...divided into two equal arcs, each arc is called a sem i-circumferen ce. All arcs of circles that are not so great as a semi-circumference are called... | |
 | J. Elliott - 1902 - 290 páginas
...called a diameter. Note.—The middle point of every diameter is the centre of the circle. Def. 39. A part of the circumference of a circle is called an arc. All radii of a circle are equal. Therefore two radii and the chord joiningthe points where they meetthe... | |
 | Charles H. Gleason, Charles Benajah Gilbert - 1910 - 288 páginas
...seconds, by the parts of the circumference opposite them, the center being at the apex of the angle. A part of the circumference of a circle is called an arc. Thus, the angle AXB is an angle of 90° and is measured by the arc B. The angle AXM is an angle of... | |
 | 1917 - 1082 páginas
...great circles is called a spherical angle. The angle CPD (Figure 4) is a spherical angle. The Arc. — A part of the circumference of a circle is called an arc. The curved line AB (Figure 5) is an arc of the circle ABC A. Complement of an Arc or Angle. — The... | |
 | Fritz E. Uttmark - 1918 - 170 páginas
...called a spherical angle. The angle CPD (Fig. 4) is a spherical angle. 6.—*Whal is an Arc? Fig. 4. A part of the circumference of a circle is called an arc. The curved line AB (Fig. 5) is an arc of the circle ABC A. Fig. 5. 7. — *What is Complement of an... | |
 | Thomas Alexander, Charles Madison Sarratt - 1924 - 462 páginas
...degree. The degree is marked °. Half a circle contains 180°, a fourth of a circle, 90°, and so on. A part of the circumference of a circle is called an arc, as A B. (See diagram.) The arc AB contains 90°. The arc AC (a semicircle) contains 180°, the arc... | |
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... the outside of the second, write the name of the boundary. In the third, write against the centre its name. And between the centre and the circumference of the fourth circle, draw a few radii and write on each its name. 23. Can you place two circles... 