An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.

You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a² - a² = 3a² but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.

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 equal sign and the answer on the other.

7x - 5 = \( \frac{x}{2} \)
2 x (7x - 5) = x
(2 x 7x) + (2 x -5) = x
14x - 10 = x
14x - 10 - x = 0
14x - x = 10
13x = 10
x = \( \frac{10}{13} \)
x = \(\frac{10}{13}\)

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 multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(5a)(8ab) - (6a²)(4b)
(5 x 8)(a x a x b) - (6 x 4)(a² x b)
(40)(a¹⁺¹ x b) - (24)(a²b)
40a²b - 24a²b
16a²b