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

A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.

A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.

To factor a quadratic expression, apply the FOIL method (First, Outside, Inside, Last) in reverse. First, find the two Last terms that will multiply to produce 8 as well and sum (Inside, Outside) to equal 9. For this problem, those two numbers are 1 and 8. Then, plug these into a set of binomials using the square root of the First variable (y²):

y² + 9y + 8
y² + (1 + 8)y + (1 x 8)
(y + 1)(y + 8)

The area of a triangle is equal to ½ base x height:

a = ½bh
a = ½ x 5 x 2 = \( \frac{10}{2} \) = 5