Answer
$18$ square centimeters
Work Step by Step
RECALL:
The area $A$ of a triangle can be found using the formula:
$A=\frac{1}{2}bh$
where
b = base
h = height
The given triangle has:
base= 4 centimeters
height = 9 centimeters
Use the formula and the given measurements above to obtain:
$A= \frac{1}{2}bh
\\A=\frac{1}{2}(4)(9)
\\A=\frac{36}{2}
\\A=18$
Thus, the area of the triangle is $18$ square centimeters.
