The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 24° - 50° = 106°

A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).

The first step to solve a quadratic expression that's not set to zero is to solve the equation so that it is set to zero:

x² - 11x + 13 = -5x + 5
x² - 11x + 13 - 5 = -5x
x² - 11x + 5x + 8 = 0
x² - 6x + 8 = 0

Next, factor the quadratic equation:

x² - 6x + 8 = 0
(x - 2)(x - 4) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (x - 2) or (x - 4) must equal zero:

If (x - 2) = 0, x must equal 2
If (x - 4) = 0, x must equal 4

So the solution is that x = 2 or 4

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).

A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.