If both pairs of opposite angles of a quadrilateral are congruent, then it is a parallelogram.
true
There are many different ways but a defining characteristic is that is has two pairs of parallel sides.
The area of a parallelogram is not enough information to determine its shape.
Yes, it is.
The area of a parallelogram does not provide enough information to determine its dimensions.
The area and perimeter of a parallelogram are not sufficient to determine its dimensions.
The lengths of the sides of a parallelogram is not enough information to determine its area.
x = 6.5y = 16.9
You can determine if a coin is not pure silver by calculating its density using the formula density = mass/volume. Compare this calculated density to the known density of pure silver (10.5 g/cm3). If the calculated density does not match the density of pure silver, then the coin is not pure silver.
That the 4 sides are equal in length and that the 4 interior angles are of the same sizes
The length and width of a parallelogram, as normally measured, does not provide enough information to determine its area.