Help me answer this thanks

c = 15 meters

Step-by-step explanation:

This is solveable using the Pythagorean Theorem,

let's say a = 9 and b = 12,

a^2 + b^2 = c^2, so

9^2 + 12^2 = 225 then,

sqrt(225) = 15, so c = 15 m

Question is incomplete

Step-by-step explanation:

But the common properties of a parallelogram are:

1. Diagonals bisect at 90 degrees

2. Opposite angles are equal

3. Opposite sides are equal

4. Rotational symmetry of order 2

5. No lines of symmetry

6. Quadrilateral.

Hope this helps