Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
If
b
b
b
be the foot of perpendicular from
A
A
A
to the plane
r
⋅
n
^
=
d
r \cdot \hat{n} = d
r
⋅
n
^
=
d
then
b
b
b
must be a.
a
+
(
d
−
a
⋅
n
^
)
n
^
a + (d - a \cdot \hat{n}) \hat{n}
a
+
(
d
−
a
⋅
n
^
)
n
^
b.
a
−
(
d
−
a
⋅
n
^
)
n
^
a - (d - a \cdot \hat{n}) \hat{n}
a
−
(
d
−
a
⋅
n
^
)
n
^
c.
a
+
a
⋅
n
^
a + a \cdot \hat{n}
a
+
a
⋅
n
^
d.
a
−
a
⋅
n
^
a - a \cdot \hat{n}
a
−
a
⋅
n
^
Browse the problem library