I ThINK IT TRUE BUT I COULD BE WRONG NOT SURE 100%

**Answer:**

find the square of both numbers

13²=169

5²=25

minus the square

169-25 to get 144

find the square root of 144

✓144=12 the third side is 12

**Answer:**

Perimeter of the Quadrilateral=20.78

**Step-by-step explanation:**

Perimeter of the Quadrilateral= AB+BC+CD+AD

Finding the sides of the quadrilateral using the **Distance formula**:

A(-3,0), B(2,4), C(3,1) and D(-4,-3)

BC=

**Perimeter of the quadrilateral**= AB+BC+CD+AD

=6.40+3.16+8.06+3.16

=20.78