The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:

a = ½(b + d)(h)
a = ½(2 + 5)(4)
a = ½(7)(4)
a = ½(28) = \( \frac{28}{2} \)
a = 14

A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.

Parallel lines are lines that share the same slope (steepness) and therefore never intersect. A transversal occurs when a set of parallel lines are crossed by another line. All of the angles formed by a transversal are called interior angles and angles in the same position on different parallel lines equal each other (a° = w°, b° = x°, c° = z°, d° = y°) and are called corresponding angles. Alternate interior angles are equal (a° = z°, b° = y°, c° = w°, d° = x°) and all acute angles (a° = c° = w° = z°) and all obtuse angles (b° = d° = x° = y°) equal each other. Same-side interior angles are supplementary and add up to 180° (e.g. a° + d° = 180°, d° + c° = 180°).

A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.

To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.

-6b + 9 > \( \frac{b}{2} \)
2 x (-6b + 9) > b
(2 x -6b) + (2 x 9) > b
-12b + 18 > b
-12b + 18 - b > 0
-12b - b > -18
-13b > -18
b > \( \frac{-18}{-13} \)
b > 1\(\frac{5}{13}\)