Answer:
here
Step-by-step explanation:
By pythagoras theorem,
AC
2
=AB
2
+BC
2
AC
2
=9+16=25
AC=5 cm
BD is the altitude from B onto AC
We have the formula for altitude,
h
2
1
=
a
2
1
+
b
2
1
Applying the same for △ABC
BD
2
1
=
AB
2
1
+
BC
2
1
BD
2
1
=
3
2
1
+
4
2
1
BD
2
=
(3
2
)+(4
2
)
(3
2
)(4
2
)
BD=
(5)
(3)(4)
....... (∵3
2
+4
2
=5
2
)
BD=
5
12
=2.4 cm
