Question

what is the area of rectangle cdef? area = square units

Explanation:

Step1: Determine the length of the base

The base of rectangle CDEF is the horizontal distance between points C and F. The x - coordinate of C is 5 and of F is 8. So the length of the base $b=8 - 5=3$.

Step2: Determine the length of the height

The height of rectangle CDEF is the vertical distance between points C and D. The y - coordinate of C is 2 and of D is - 4. So the height $h=2-(-4)=6$.

Step3: Calculate the area of the rectangle

The area formula of a rectangle is $A = b\times h$. Substitute $b = 3$ and $h = 6$ into the formula, we get $A=3\times6 = 18$.

Answer:

18