Answer:
a square plus b square equal c square
Step-by-step explanation:
This can be solved using the
angle bisector theorem. Note that line segment AD is the angle bisector of triangle DAB from angle DAB. Therefore, we know that the ratios
and
are equal. Solving, we get
. Cross multiplying, we get
, and solving this equation we get
.
10.2 is your answer.
DBE is similar to ABC by the SAS Similarity Theorem