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Let the height be h
b= base
a= equal sides
so height (h) = √(a² - b²/4)
h = √(45² - 72²/4 ) 
h = 27 cm

area of triangle = 1/2 x h x b = 1/2 x 27 x 27 = 972 cm²

So the height = 27 cm and area = 972 cm²

4 3 4
thank you
thank you sooooooo much :D
have u understand the thing ??
kinda but will do........thanks again
Let hight be = h
height=(45square - 72square/4)

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