In this lesson our instructor talks about measuring segments. She talks about segments, ruler postulate, segment addition postulate, and the Pythagorean Theorem. She then discusses the distance formula and does some examples. Four complete extra example videos round up this lesson.
Ruler postulate: The points on any line can be paired with real numbers so that, given any two points P and Q on the line, P corresponds to zero, and Q corresponds to a positive number
If Q is between P and R, then QP + PR = QR
If PQ + QR = PR, then Q is between P and R
Pythagorean Theorem: In a right triangle, the sum of the squares of the measures of the legs equals the square of the measure of the hypotenuse
The distance d between any two points with coordinates (x1, y1) and (x2, y2) is given by the formula
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.