GM-U1.4 Lesson: Distance Formula

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Warm-Up: Learning Log!

Describe what you remember from our class yesterday.

Unit 1 Lesson 4
Distance Formula

The longest side of a right triangle, also the side opposite the right angle.

​Hypotenuse

​Pythagorean Theorem

Concepts:

​Derivation:

​Pythagorean Theorem ----------------------------> Distance Formula

​Procedures:

1) Find the coordinates of the line.
2) Substitute the coordinates into the distance formula.
3) Evaluate.

Find the length of AB.

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​Example 1:

Find the length of AB.

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​Example 2:

Example 3:

Find the distance between the points: (-7, 3) & (6, 9).