In the corner of Mike's backyard, he
needs to build a dog pen. The back corner
of the pen is a right angle. The base or
front of the pen is 18 feet long and the
distance from the front of the pen to the
back corner is 10 feet. Mike's wife wants
to make sure the dog has plenty of room
to run around in the pen.
- Using the
formula below to find the area of a triangle,
where
b, the base, is 18 feet and h, the distance
from the front of the pen to the corner,
is 10 feet, how much area will the dog
have to run around in?
A = 1/2 * bh
- 180 feet squared
- 100 feet squared
- 90 feet squared
- 80 feet squared
|
To find the correct
answer to this problem you need to substitute
the correct values into the given area formula
for a triangle and solve.
Begin by substituting the values for b and
h.
- A = 1/2 * 18 * 10
- A = 1/2 * 180
- A = 90 feet squared
Using substitution, you found the area of
the triangular pen to be 90 feet squared.
This is letter C, so you are all finished
with this one! |
