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01 Aug 2017, 13:38
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Difficulty:
25%
(medium)
Question Stats:
79% (01:29) correct
21%
(01:49)
wrong
based on 48
sessions
History
Date
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Ricardo lives 4 kilometers due west of Pat's house. Ann lives 6 kilometers due north of Pat's house, and 4 kilometers due west of David's house. What is the straight-line distance, in kilometers, from Ricardo's house to David's house?
(A) 4
(B) 5
(C) 8
(D) 10
(E) 12
(A) 4
(B) 5
(C) 8
(D) 10
(E) 12
01 Aug 2017, 14:09
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Bunuel
Ricardo lives 4 kilometers due west of Pat's house. Ann lives 6 kilometers due north of Pat's house, and 4 kilometers due west of David's house. What is the straight-line distance, in kilometers, from Ricardo's house to David's house?
(A) 4
(B) 5
(C) 8
(D) 10
(E) 12
(A) 4
(B) 5
(C) 8
(D) 10
(E) 12
The 2 right triangles will form with base 4 and height 3
using pythagorus
D)
01 Aug 2017, 22:24
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Bunuel
Ricardo lives 4 kilometers due west of Pat's house. Ann lives 6 kilometers due north of Pat's house, and 4 kilometers due west of David's house. What is the straight-line distance, in kilometers, from Ricardo's house to David's house?
(A) 4
(B) 5
(C) 8
(D) 10
(E) 12
A........4........D(A) 4
(B) 5
(C) 8
(D) 10
(E) 12
.
.
.
6
.
.
.
R.......4.......P
This is equivalent to
A........4........D
. .
. .
. .
6 .
. .
. .
. .
R.......4.......P.................X
RX = RP + AD = 8
XD = PA = 6
RD = SQRT (RX^2 + XD^2) = 8
