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Big Ideas Math Geometry, 2014
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Big Ideas Math Geometry, 2014 View details
3. Proofs with Parallel Lines
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Exercise 43 Page 144

Use the Distance Formula.

13

Practice makes perfect
To determine the distance between two points, we use the Distance Formula. The coordinates of the given points are (5,- 4) and (0,8).
d = sqrt((x_2-x_1)^2 + (y_2-y_1)^2)
SubstitutePoints

Substitute ( 5,- 4) & ( 0,8)

d=sqrt(( 0- 5)^2+( 8-( - 4))^2)
SubNeg

a-(- b)=a+b

d=sqrt((0-5)^2+(8+4)^2)
AddSubTerms

Add and subtract terms

d=sqrt((- 5)^2+12^2)
CalcPow

Calculate power

d=sqrt(25+144)
AddTerms

Add terms

d=sqrt(169)
CalcRoot

Calculate root

d=13
The distance between the given points is 13.
Subchapter links expand_more
arrow_right Communicate Your Answer p.137
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arrow_right Monitoring Progress p.138-141
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arrow_right Exercises p.142-144
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Exercises 7 (Page 142)
Exercises 8 (Page 142)
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Exercises 10 (Page 142)
Exercises 11 (Page 142)
Exercises 12 (Page 142)
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Exercises 38 (Page 144)
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Exercises 40 (Page 144)
Exercises 41 (Page 144)
Exercises 42 (Page 144)
Exercises 43 (Page 144)
Exercises 44 (Page 144)