Answer:
The base is 11 cm.
Step-by-step explanation:
The formula for the area of a triangle is [tex]A = \frac{1}{2} bh[/tex]. If we plug in what we know to this equation, we are left with [tex]121 = \frac{1}{2} * b * 2b[/tex], which we now need to simplify.
First, we combine like terms.
[tex]121 = \frac{1}{2} * 2b^{2}[/tex]
Then, we can eliminate the [tex]\frac{1}{2}[/tex] and [tex]2[/tex] on the right side of the equation, since they cancel each other out.
[tex]121 = b^{2}[/tex]
Finally, we take the square root of both sides of the equation and find our answer:
[tex]11 = b[/tex]
