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.

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.

2a x 3b = (2 x 3) (a x b) = 6ab

To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses.

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.

3y + 7 < \( \frac{y}{-5} \)
-5 x (3y + 7) < y
(-5 x 3y) + (-5 x 7) < y
-15y - 35 < y
-15y - 35 - y < 0
-15y - y < 35
-16y < 35
y < \( \frac{35}{-16} \)
y < -2\(\frac{3}{16}\)

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