Given A=(1/2)(h)(a+b) Find:
a. A if h=25, a=15, b=42
b. h if A=260, a=8, b=5
c. a if A=322, h=14, b=15
d. b if A=448, h=16, a=25
This makes no sense to me whatsoever. Please clarify as to what I'm supposed to do?
Thank you very much!
I recognize the formula for the area of a trapezoid where a and b are the two parallel sides and h is the height between them, so just plug in the values.
I will do the first
a. A = (1/2)(25)(15+42)
= (1/2)(25)(57) = 1425/2 or 712.5 square units
do the others the same way, except you are given different combinations
d. 448 = (1/2)(16)(25+b)
448 = 8(25+b)
56 = 25 + b
b = 31
etc