What is the geometric mean of 7 and 12?
a.1
b.9.5
c.2√21
d.4√21

The correct answer is option B. i..e 9.5 The geometric mean of any two numbers a and b is given as the squareroot of the product of a and b. Thus, the geometric mean of 7 and 21 is sqrt(7*12) = sqrt(84) = 9.16 ~ 9.5

1. statement- ca is parallel to db and e is the midpoint of ad reason- given2. statement- reason- alternate interior angles3. statement- de is congruent to ae reason- definition of midpoint4. statement- triangle aec is congruent to triangle deb reason- asa (angle side angle)