# Junior High School Mathematics: First [-third] Course, Book 3

Macmillan, 1919 - Mathematics
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### Contents

 THIRD COURSE 2 II 13 81104 105 GEOMETRY 191
 CONGRUENT TRIANGLES 200 APPENDIX 285 Copyright

### Popular passages

Page 17 - The square root of a number is one of the two equal factors of the number.
Page 196 - If two triangles have two sides and the included angle of one equal respectively to two sides and the included angle of the other, the triangles are equal.
Page 42 - The specific gravity of a substance is the ratio of the weight of the substance to the weight of the same volume of...
Page 219 - An exterior angle of a triangle is equal to the sum of the two opposite interior angles.
Page 148 - The first and last terms of a proportion are called the extremes ; the second and third terms are called the means. In the proportion | = ��, we see that 7 x 15 = 3 x 35.
Page 252 - In a right triangle the square of the hypotenuse equals the sum of the squares of the other two sides or legs.
Page 30 - Pythagorean theorem, which states that the square of the hypotenuse of a right triangle equals the sum of the squares of the other two sides.
Page 195 - Obtuse Acute Equiangular 64. Corresponding Angles and Sides. If two triangles have the angles of the one respectively equal to the angles of the other, the equal angles are called corresponding angles, and the sides opposite these angles are called corresponding sides. Corresponding parts are also called homologous parts. 65. Square. A rectilinear figure having four equal sides and four right angles is called a square. 66. Congruent. If two figures can be made to coincide in all their parts, they...
Page 222 - If a line is perpendicular to one of two parallel lines, it is perpendicular to the other also.
Page 228 - A Sphere is a body bounded by a uniformly curved surface, all the points of which are equally distant from a point within called the center.