1).
a=bh
=(13)(9)
=117in^2
2).
A=1/2h(b1+b2)
=1/2(14)(15+9)
=168cm^2
3).
A=1/2d1d2
=1/2(18)(11)
=99in^2
The answer to your question is
d.
78.5 m^2
Answer:
the common difference is 10
