Calculate the area of triangle cde with altitude ef, given c (3, −2), d (−1, 2), e (2, 3), and f (0, 1).
a. 4 square units
b. 6.2 square units
c. 8 square units
d. 8.7 square units

check the picture below.

so then, its base is dc and we know its altitude or height is ef, so it has an area of (1/2)(dc)(ef).

this was already solved by me with a different person. if you look it up in the search bar at the top of the page, you will get the answer.

step-by-step explanation:

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's