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Midpoint & Distance Formulas
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1.3 Midpoint & Distance Formulas HW pg. 19 #436 evens 24 August 19, 2014 Bellwork 1. Find the missing length 2. Are DE & GH congruent, if D(-4,11), E(-4,-13), G(-14,5), H(-9,5)? 3. How do you name a plane? 4. What is a postulate? 5. 2 + 3 NO, DE = 24 & GH = 5 Must be 3 non-collinear points in that plane 3.2 A B C 2 3.2 - 2 = 1.2 a rule that is accepted without proof 2 1 3 4 2 + 3 2 4 3 4 5 5 = 6 1 4 4 =
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Page 1: 1.3 notes

1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

Bellwork1. Find the missing length2. Are DE & GH congruent, if D(-4,11), E(-4,-13), G(-14,5), H(-9,5)?3. How do you name a plane?4. What is a postulate?

5. 2 + 3

NO, DE = 24 & GH = 5

Must be 3 non-collinear points in that plane

3.2

A B C23.2 - 2 = 1.2

a rule that is accepted without proof

21 3

4 2 + 3

24

34

5 5 = 6 1 4 4=

Page 2: 1.3 notes

1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

1.3 Midpoint and Distance

Midpoint (M): point that divides the segment into 2 congruent ( ≅) segments

A BM

Segment Bisector (CD):a point, ray, line, line segment, or plane that intersects the segment at its midpoint.

C

D

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

Midpoint Formulax1 + x2 y1 + y2 2 2( ),

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

Distance Formula

AB = √(x2 - x1)2 + (y2 - y1)2

(AB)2 = (x2 - x1)2 + (y2 - y1)2 or

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

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1.3 Midpoint & Distance Formulas

HW pg. 19 #4­36 evens ­24

August 19, 2014

HW: pg 19

#4-36 evensexcept 24. yippee!!


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