Area of parallelogram = base x height, Area of triangle = (base x height) ÷ 2, Parallelogram: a quadrilateral with equal and parallel opposite sides. (A square and rectangle are examples of a parallelogram.), Congruent: of the same shape and size, Prism: a three-dimensional shape with 2 congruent bases that each have 3 or more sides., Face: a flat surface of a three-dimensional shape (solid), Pyramid: a solid three-dimensional shape with a polygon base and triangular faces that taper to a point, also called the vertex or apex., Surface Area of a Triangular Prism: SA = 2𝑏𝑎𝑠𝑒 + 𝑟₁+ r₂ + r₃, Trapezoid: a quadrilateral with one pair of opposite sides parallel. It can have right angles (a right trapezoid), and it can have congruent sides (isosceles), but those are not required, improper fraction: A fraction greater than 1 that is not expressed as a mixed number; a fraction in which the numerator is larger than the denominator, lowest terms (simplest form): the form of a fraction in which the numerator and denominator have no common factors other than 1; another term for simplest form, Mixed number: a number greater than 1 expressed as a whole number plus a fraction whose value is less than 1, Common denominator: for two or more fractions, a common multiple of the denominators, Fraction: a number expressed as some number of equal parts of a whole, equivalent fractions: two or more different fractions that represent the same quantity, Numerator: the top number in a fraction, which shows how many equal parts are to be counted; also, the dividend, unit fraction: a fraction with a numerator of 1, denominator: the bottom number in a fraction, which shows into how many equal parts the whole is divided; also, the divisor, Properties of Trapezoid (Part 1). The bases (the top and bottom) are parallel to each other. Opposite sides of a trapezoid (isosceles) are of the same length., Properties of Trapezoid (Part 2). Angles next to each other sum up to 180°. The median is parallel to both the bases. Median's length is the average of both the bases

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