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Moldova Contests
Moldova National Olympiad
2009 Moldova National Olympiad
7.4
7.4
Part of
2009 Moldova National Olympiad
Problems
(1)
computational in 90-75-15 triangle (2009 Moldova NMO 7.4)
Source:
3/25/2021
Triangle
A
B
C
ABC
A
BC
with
A
B
=
10
AB = 10
A
B
=
10
cm ¸and
∠
C
=
1
5
o
\angle C= 15^o
∠
C
=
1
5
o
, is right at
B
B
B
. Point
D
∈
(
A
C
)
D \in (AC)
D
∈
(
A
C
)
is the foot of the altitude taken from
B
B
B
. Find the distance from point
D
D
D
to the line
A
B
AB
A
B
.
geometry
right triangle