Concrete Geometry for Beginners |
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12 inches 20 inches 9 inches Algebra altitude angle ABC angles formed apothem arc BC area and perimeter base angle bisects chord circle whose diameter circle whose radius circumference complementary angles contains cube decagon decimeters diagonal divided Draw a circle Draw a rectangle edge equal sides equilateral triangle exterior angles Find each side find its area Find the area Find the length Find the number Find the perimeter Find the ratio Find the sum geometric principle greater homologous sides hypotenuse inches long inches longer inclosed inscribed inscribed angle interior isosceles triangle longer sides meters middle point millimeters NOTE number of degrees parallel parallelogram parallelopiped pentagon perim perpendicular plane figure radii regular hexagon regular polygon rhomboid rhombus right angle right triangle scalene triangle sector semicircle shorter sides show the truth square feet square inches straight line surface tangent trapezium trapezoid triangle whose base twice vertex vertical angle width
Popular passages
Page 82 - 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 20 - A circle is a plane figure bounded by a curved line, every point of which is equally distant from a point within called the center.
Page 173 - The square of the sum of two numbers is equal to the square of the first, plus twice the product of the first and the second, plus the square of the second.
Page 177 - Pythagoras' theorem states that the square of the length of the hypotenuse of a right-angled triangle is equal to the sum of the squares of the lengths of the other two sides.
Page 101 - Hence, the area of a trapezoid is equal to the product of its altitude by the line connecting the middle points of the sides which are not parallel.