The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 27° - 22° = 131°

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.

-3c - 6 < -7 + 3c
-3c < -7 + 3c + 6
-3c - 3c < -7 + 6
-6c < -1
c < \( \frac{-1}{-6} \)
c < \(\frac{1}{6}\)

A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s²).

An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.

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.

(4a)(4ab) + (6a²)(5b)
(4 x 4)(a x a x b) + (6 x 5)(a² x b)
(16)(a¹⁺¹ x b) + (30)(a²b)
16a²b + 30a²b
46a²b