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# CBSE Class 9 Answered

The lengths of the sides of a triangle are 5 cm, 12 cm and 13 cm. Find the length of perpendicular from the opposite vertex to the side whose length is 13 cm.
Asked by Topperlearning User | 31 Mar, 2014, 12:15: PM

Here  a=5cm, b=12cm,  c=13cm

=
=
Let A be the area of the given triangle, then
A      =
=
=  = 30 cm2
Let p be the length of the perpendicular from vertex D on the side BC, then
A       =
2A       = 13p
2 × 30 = 13P
Hence, length of perpendicular from the opposite vertex to the side whose length is 13 cm is  cm.
Answered by | 31 Mar, 2014, 02:15: PM

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