Question

A tree casts a 20 foot shadow. brian is 6 feet tall and casts a 4 foot shadow. how tall is the tree.

Answer 1

Brian and shadow to Z point math hypotenuse of a right triangle . Tree and shadow to the right-angled triangle hypotenuse well . Shadow length depends on the angle of incidence of solar prmieni . The angle of Padania , in both cases the same joke . So tangents hypotenuse same joke .

tg = a/b
Brian
a/b = 6ft/4ft = 1,5

A tree
a/b = a/20ft

a/20ff = 3/2    We multiply the cross

2a = 60ft
a = 30tf

Answer : The tree is 30 feet

Answer 2

30 ft

Ratio is

6/4 = 1.5

Times that by the shadow

1.5 x 20 = 30