Question

find the Area of ABC, if BC=15cm and height AD =18 cm​

Answer 1

Answer:

Here ABC is a triangle in which

AB = 15 cm, AC = 15 cm and BC = 18 cm

Draw AD perpendicular to BC, D is mid-point of BC.

Then, BD = DC = 9 cm

in right angled triangle ABD,

By Pythagoras theorem, we get

AD =  12 cm

(i) cos  ABC = Base/ Hypotenuse

(In right angled )

= BD / AB

= 9/15

= 3/5