8. Circle A has a radius of 21 meters. Circle B has a radius
of 28 meters.
9.
b.is the relationship
between the radius and
circumference the same for
all circles? Explain.
a. Find the circumference
of each circle in terms of T.
d

According to the properties of a parallelogram.

Its opposite angles are equal and its opposite sides are also equal.

Now for a parallelogram to be a rectangle,

All its angles must be 90°.

But we also want the parallelogram to be a rhombus, which means all its sides must be equal.

Now any rectangle whose all sides are equal becomes a square.

And so parallelogram which is both a rectangle and a rhombus is a SQUARE.