 | Arthur Schultze - Algebra - 1919 - 618 pages
...10,475,429. II. If the sides of a square were increased by one foot, the area would be increased (a) 17, (&) 917, (c) 415,673 square feet. Find the side of the...first. Find the first angle. Solve the problem if : (b) the second angle = 2 times the first, the third angle = ft times the first. (c) the second .angle... | |
 | Arthur Schultze - 1919 - 400 pages
...area would be increased (a) 17, (b) 917, (c) 415,673 square feet. Find the side of the square. 51.The sum of the three angles of any triangle is equal to...third angle 5 times the first. Find the first angle. 52.The second angle of a triangle equals m times the first, and the third equals n times the first.... | |
 | John Charles Stone - Mathematics - 1919 - 232 pages
...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.)... | |
 | 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 a straight... | |
 | 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 degrees... | |
 | 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... | |
 | Sir Thomas Little Heath - Mathematics - 1921 - 482 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... | |
 | College Entrance Examination Board - Universities and colleges - 1922 - 124 pages
...credits will not be given on this paper for plane geometry and solid geometry. Take ir=3} 1. Prove: The sum of the three angles of any triangle is equal to two right angles. 2. Prove: If two triangles have their sides respectively proportional, the triangles... | |
 | Charles William Weick - Geometrical drawing - 1925 - 276 pages
...between 90° and 180°. TRIANGLES 320. A triangle is any plane figure bounded by three straight lines. The sum of the three angles of any triangle is equal to 180°. If one of the angles is 90°, or a right angle, the sum of the other two is 90°. In radian measure,... | |
 | John Charles Stone - Mathematics - 1926 - 344 pages
...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.)... | |
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The sum of the three angles of any triangle is equal to 180°. 
