Search 75,089 tutors
FIND TUTORS
Ask a question
0 0

geometry: one endpoint of PQ is (-2,4). the midpoint of PQ is M (1,0).

Tutors, please sign in to answer this question.

2 Answers

Most everyone knows the Pythagorean Theorem and you can use it to solve this problem. Where is the right triangle? Connect the points (-2,4), (1,0) and (-2,0). One leg measures 3, the other leg measures 4, so the hypotenuse is 5! Five is the length of half PQ, so the whole line segment PQ is 10!

 

 

Formula of a distance between two points is d = √((x1 - x2)2 + (y1 - y2)2)        

P ( -2 , 4 )     M ( 1 , 0 ) 
      ↑    ↑            ↑   ↑    
     x1    y1          x2   y2  

dPM = √((-2 - 1)2 + (4 - 0)2) = √25 = 5   

dPQ = 2dPM = 2*5 = 10 units

Seattle geometry tutors