Question

6.
In A
triangleABC,angle A = 90°, AB = 5cm, BC = 13cm and AD perpndicul BC.
Then the length of AD is-
​

Answer 1

Answer:

area of triangle = (1/2) × basexheight =

if we take AC as perpendicular then AB will

be base.

then area of triangle = (1/2)x 5 x 12 = 30 cm? = also, by Pythagoras' theorem,

BC2 = AC2 +AB2

=122 + 52 = 169

BC = 13 cm

now, if AD is perpendicular then BC is the

base

area of triangle = (1/2)x BC xAD =

30 = (1/2)x 13×AD

AD = 60/13 =4.61 cm

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