4.7D

A ray is a part of a line that starts at a point and extends infinitely in one direction.

An angle is formed by two rays that share a common endpoint, called the vertex.

A protractor is a tool used to measure angles in degrees.

Align one ray with the baseline of the protractor and read the degree measurement where the other ray crosses the protractor.

To construct an angle means to draw it accurately using a protractor or compass.

A right angle measures 90 degrees.

A straight angle measures 180 degrees.

An acute angle is an angle that measures less than 90 degrees.

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Ray D needs to be at 105 degrees.