Measuring Segments Chapter 1.4.

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Presentation transcript:

Measuring Segments Chapter 1.4

Postulate: a statement that is assumed to be true. Vocabulary: Postulate: a statement that is assumed to be true. Postulate 1-2: Segment Addition Postulate states that if Q is between P and R, then PQ + QR = PR. If PQ + QR = PR, the Q is between P and R. P Q R

Find QR. 80 P Q R 20 ?

Find PR. ? P Q R 37 73

Find QR. 30 P Q R 6x - 5 2x + 3

Find PQ. 21 P Q R 3x - 1 2x - 3

Pythagorean Theorem: a² + b² = c² Find the distance from A(1,2) to B(6,7).

Pythagorean Theorem: a² + b² = c² Find the distance from A(-6,-6) to B(6,-1).

Distance Formula: d= √ (x –x )² + (y – y )² 2 1 2 1 Find the distance from A(-6,-6) to B(6,-1).

Distance Formula: d= √ (x –x )² + (y – y )² 2 1 2 1 Find the distance from A(-4,5) to B(5,-3).