Posted by T on Thursday, December 2, 2010 at 7:52pm.
Terence wants to estimate the height of a tree. He places a mirror on level ground, as shown in the picture below, and stands so that he can see the top of the tree in the mirror. Since light bounces off the mirror at the same angle at which it strikes the mirror, angle 1 equals angle 2, and ÄABC is similar to ÄCDE.
If Terrence's eyes are exactly 6 feet from the ground and the mirror is 20 feet from the tree and 1 foot from Terence, how tall is the tree?
please help!

Algebra  T, Thursday, December 2, 2010 at 8:11pm
can i get a formula?

Algebra  jacob, Wednesday, April 6, 2011 at 5:45pm
if i am correct it should be 120 because its cross mutiplying so 6*20=120/1= 120

Algebra  Anonymous, Friday, December 21, 2012 at 4:52pm
tg

Algebra  Anonymous, Friday, December 21, 2012 at 4:53pm
120 ft

Algebra  d, Wednesday, January 30, 2013 at 6:33pm
120

Algebra  vannessa, Wednesday, February 6, 2013 at 12:22pm
Terence wants to estimate the height of a tree. He places a mirror on level ground, as shown in the picture below, and stands so that he can see the top of the tree in the mirror. Since light bounces off the mirror at the same angle at which it strikes the mirror, angle 1 equals angle 2, and ΔABC is similar to ΔCDE.
If Terrence's eyes are exactly 6 feet from the ground and the mirror is 20 feet from the tree and 1 foot from Terence, how tall is the tree?