Acd and a dvd have the same diameter. explain why they have the same circumference

Circumference is equal tp pi*diameter. Because pi is a fixed constant and diameter is the same, the two circumferences are the same.

Any two circular objects with the same diameter or the same radius have the same circumference.

The correct option is  that is ray.

Further explanation:

Given:

The undefined terms are point and a line.

Angle:

An angle can be drawn with the combination of two rays that has common endpoint.

The rays are the sides of the angle and the common end point is the vertex of the angles.

The symbol to represent the angle is “ ”.

The angle is measured with the use of protractor.

Circle:

A circle is the two dimensional figure that involves the locus of all points which is equidistant from a central point.

A ray:

It is straight line that has one fixed point and it can be extended from another point.

Parallel lines:

Parallel lines are those lines that do not intersect each other.

Therefore, the undefined term point and a line is use in the definition of a ray.

Thus, option D is correct.

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Answer details:

Grade: Junior school

Subject: Mathematics

Chapter: Line, rays and angles.

Keywords:

Angle, rays, lining, vertex, line, segment, line segment, mid point, degrees, zero line, protractor, scale, parallel lines, intersects, circle, fixed point, extended