a circle
a shape with equal sides
The distance around a two dimensional shape is known as the perimeter of the shape. If the shape is circular, it may be refered to as a circumference.
error in shape,size,or distance
Circumference. If you have a rectangle, then the circumference (length of the sides) is equal to 2*height + 2*width.
A cube is a 3D shape that has 6 faces of equal area.
A circle
a circle
Equilateral
That shape is called a circle.
Ripples are just waves of energy moving outward from a central focal point or origin. Since the energy moves at the same rate or speed on all sides, away from the center, the ripples appear round (since a circle is a continuous line of equal distance around a center point).
Gravity exhibits equal force on all parts, so the distance from the center is about the same on all parts of earth.
A circle or a sphere
A circle has a round shape in which every point on the circle is the same distance from one point called "the center". The center of a circle is not on the circle.
If the shape is two-dimensional then it is a circle, if the shape is three-dimensional then it's a sphere.
It is a pair of compasses.
A circle.
A sphere.