An umbrella you bought is shaped like a regular octagonal pyramid with a side length of four feet and a slant height of feet. estimate the amount of fabric that the umbrella has.

The complete question in the attached figure

we know that
[amount of fabric]=8*[area of lateral triangle side]
area of lateral triangle side=(1/2)*4*5----> 10 ft²
so
[amount of fabric]=8*[10]----> 80 ft²

the answer is
80 ft²

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)