Question

2. Calculate DE.
a. 26.016
b. square root 82
c. 8
d. square root 33

Answer 1

DE = geometric mean of (3) and (3+8)

Answer 2

DE = \(\sqrt{3 \times 11}\)

Answer 3

what is geometric mean??

Answer 4

geometric mean of a, b is sqrt(ab)

Answer 5

ok makes sense thanks a bunch!

Answer 6

http://www.mathwarehouse.com/geometry/similar/triangles/geometric-mean.php geometric mean as ganeshie8 said


thus \(\bf \textit{using similar figures ratio}\\ \quad \\
\cfrac{3}{DE} = \cfrac{DE}{3+8}\\ \quad \\
\textit{solve for }DE\)