 | Frank Eugene Austin - Electric currents, Alternating - 1916 - 260 pages
...196-100-144 -48 cos C = — - - - . „ - - = — — = +0.2 From tables, angle C = 78° 28' . . Since the sum of the three angles of any triangle is equal to 2 right angles or 180 degrees (or IT radians), the above result may be checked by adding the values... | |
 | John Charles Stone, James Franklin Millis - Geometry - 1916 - 298 pages
...are called the angles, or, for distinction, the interior angles, of the triangle. 48. Theorem. — The sum of the three angles of any triangle is equal to a straight angle. Hypothesis. ZA, Z. B, and ZC are the angles of A ABC. Conclusion. ZA + ZB + Z (7=... | |
 | James Champlin Fernald - English language - 1918 - 488 pages
...all that grammar requires. It is perfectly grammatical to say, "Light is the same as darkness," or, "The sum of the three angles of any triangle is equal to three rightangles." However false these statements may be, the words are properly connected, which... | |
 | John Charles Stone - Mathematics - 1919 - 232 pages
...formed by all three angles of the triangle ? By trying this experiment with any triangle, you will find that, The sum of the three angles of any triangle is equal to 180 degrees. 12. How many degrees in each angle of an equilateral triangle ? (The angles are all equal.)... | |
 | John Charles Stone - Mathematics - 1919 - 248 pages
...all three angles of the triangle ? By trying this experiment with any triangle, you will find that, D The sum of the three angles of any triangle is equal to 180 degrees. 12. How many degrees in each angle of an equilateral tiiangle ? (The angles are all equal.)... | |
 | Matilda Auerbach, Charles Burton Walsh - Geometry, Plane - 1920 - 408 pages
...perimeter to be 110 feet. JUNE, 1906 (ONE HOUR AND A HALF) The University Provides a Syllabus 1. Prove that the sum of the three angles of any triangle is equal to two right angles. On a line AE choose a point B, and construct an isosceles triangle ABC with AB as base, the base angles... | |
 | Clarence E. Paddock, Edward Ellsworth Holton - Arithmetic - 1920 - 250 pages
...obtuse angle, as the triangle MNP. (Fig. 31.) FIG. 30.—Acute Triangle. F 7 G. 31.—Obtuse Triangle. The sum of the three angles of any triangle is equal to 180 degrees or two right angles. The sum of the two acute angles of a right triangle is equal to 90... | |
 | Arvid Reuterdahl - Minnesota - 1920 - 310 pages
...1. Only one straight line can be drawn through a given point parallel to a given straight line. 2. The sum of the three angles of any triangle is equal to 180°. 3. Space regarded as infinite. The perspective view of infinitely distant parts of a plane is... | |
 | Sir Thomas Little Heath - Mathematics - 1921 - 474 pages
...parallel lines, which they used for the purpose of establishing by a general proof the proposition that the sum of the three angles of any triangle is equal to two right angles. This latter proposition they again used to establish the well-known theorems about the sums of the exterior... | |
 | Sir Thomas Little Heath - Mathematics - 1921 - 474 pages
...parallel lines, which they used for the purpose of establishing by a general proof the proposition that the sum of the three angles of any triangle is equal to two right angles. This latter proposition they again used to establish the well-known theorems about the sums of the exterior... | |
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The sum of the three angles of any triangle is equal to two right angles, this is a . Theorem, the truth of which is demonstrated by Geometry. 
