Answer:
4.41
Step-by-step explanation:
To find the area of a triangle you need the base length and the height of the triangle
I used the Pythagorean theorem to find the height
[tex]h^{2} +2.1^{2}=3^{2}[/tex]
I used 2.1 because the height will split the base in half
h=2.1
Now that we have the height you plug that into the Area formula
[tex]\frac{1}{2} bh[/tex]
[tex]\frac{1}{2}[/tex](4.2)(2.1)= 4.41
