Answer:
80 square centimeters
Explanation:
see the attached figure to better understand the problem
we know that
The total area of the arrow is equal to the area of a rectangle plus the area of a triangle
step 1
Find out the area of the rectangle
The area of rectangle is equal to

we have

substitute

step 2
Find the area of triangle
The area of triangle is equal to

we have

substitute

step 3
The area of the arrow is equal to

substitute the values
