Junior High School Mathematics, Book 3B.H. Sanborn & Company, 1921 - Mathematics |
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a+b)² acute angle algebraic fraction altitude angle equal angle of elevation angles are equal arithmetic binomial called cent central tendency compasses construct cost cross products denotes diameter divided dividend division divisor equation exercises expressed factors feet figure final score find the distance Find the height Find the number Find the product formula give given graph Hence hypotenuse inches inclosed length line segment literal mathematics measure method miles minus signs monomial Multiplying negative number pair plane table polynomial problem profit protractor quotient r₁ ratio rectangle represent result revolutions per minute right angle right triangle scale drawing shown sides sign of grouping signed numbers similar triangles solution Solve special products square root straight angle straight line subtraction temperature trinomial unknown number yards zero
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Page 25 - PERIPHERY of a circle is its entire bounding line ; or it is a curved line, all points of which are equally distant from a point within called the center.
Page 60 - The image appears to be as far behind the mirror as the object is in front of it.
Page 102 - Divide the first term of the dividend by the first term of the divisor, and write the result as the first term of the quotient. Multiply the whole divisor by the first term of the quotient, and subtract the product from the dividend.
Page 58 - Two triangles are congruent if two angles and the included side of one are equal respectively to two angles and the included side of the other.
Page 102 - Arrange the dividend and the divisor in either ascending or descending powers of some common letter. 2. Divide the first term of the dividend by the first term of the divisor, and write the result as the first term of the quotient. 3. Multiply the whole divisor by the first term of the quotient ; write the product under the dividend and subtract it from the dividend.
Page 52 - In a right triangle, the side opposite the right angle is called the hypotenuse and is the longest side.
Page x - Since the number of square units in the area of a rectangle is equal to the product of the number of...
Page 183 - In two similar triangles, the sides of the larger are 12 in., 14 in., and 20 in., and the shortest side of the smaller is 3 in. Find the other sides of the smaller triangle. 2. The sides of a triangular field are 16 rd., 24 rd., and 30 rd. The smallest side of a similar field is 40 rd. Find the other two sides. 3. A tree casts a shadow 48 ft. long when a vertical rod 6 ft. high casts a shadow 4 ft. long. How high is the tree ? 4. A church spire casts a shadow 23 ft. long when a man 5 ft. 10 in. tall...
Page 49 - C. Proof. Since the chords of the arcs LM and PQ are equal the arcs are equal. The angles are equal because with equal radii equal arcs are intercepted by equal angles.
Page 7 - The formula states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the base and altitude.