Two lines 
and 
intersect at the point R. the reflection of R in the xy-plane has coordinates
a.
(2, 4, 7)
b.
(− 2, 4, 7)
c.
(2, − 4 , −7)
d.
(2, − 4, 7)
and intersect at the point R. the reflection of R in the xy-plane has coordinatesa.
(2, 4, 7)
b.
(− 2, 4, 7)
c.
(2, − 4 , −7)
d.
(2, − 4, 7)
Question ID - 57136 | SaraNextGen Top Answer Two lines and intersect at the point R. the reflection of R in the xy-plane has coordinates
a.
(2, 4, 7)
b.
(− 2, 4, 7)
c.
(2, − 4 , −7)
d.
(2, − 4, 7)
Two lines and intersect at the point R. the reflection of R in the xy-plane has coordinates
|
a. |
(2, 4, 7) |
b. |
(− 2, 4, 7) |
|
c. |
(2, − 4 , −7) |
d. |
(2, − 4, 7) |
1 Answer
127 votes
Answer Key / Explanation : (c) -
Point on L1(
+3, 3
− 1 , −
+ 6)
Point on L2(7
− 5 , −6
+2, 4
+ 3)
⇒ 
+ 3 = 7
− 5 ...(i)
3
− 1 = −6
+2 …(ii)
⇒ 
= −1, 
=1
point R(2, −4, 7)
Reflection is (2, −4, −7)
127 votes
Answer Link
127