The angle of incidence and reflection are reference to of a line normal or perpendicular to a surface. The incidence angle is the incoming ray angle relative to the normal line and the reflection is the outgoing angle relative to the normal line. Both angles are in the plane containing the normal line and the incidence ray.
The answer depends on knowing what the plane mirror hhas a 20-degree angle relative to!
aspect
Means a device which measures the angle of the boom relative to horizontal. Enable to determine measurements to a precision degree.
The answer depends on the curvature relative to the size of the pentagon.
The friction angle of the mixture increases the relative density.
The angle of incidence and reflection are reference to of a line normal or perpendicular to a surface. The incidence angle is the incoming ray angle relative to the normal line and the reflection is the outgoing angle relative to the normal line. Both angles are in the plane containing the normal line and the incidence ray.
The answer depends on knowing what the plane mirror hhas a 20-degree angle relative to!
the angle relative to the wheel and chassis turning around corners
This is often measured as something called the "position angle".
aspect
The relative position in the sky (relative to the Sun) is completely related to the phase. For example, at full moon the Moon will be opposite the Sun (an angle of almost 180 degrees), at new moon it will be near the Sun (an angle near zero degrees), and at half-moon it will be at a 90 degrees angle.
it is the clock wise angle in radian or degree from heading of vessel to a straight line drawn from the station on the vessel to the object.
Light hitting a flat mirror at an angle is reflected at the same angle, relative to the mirror surface.
Means a device which measures the angle of the boom relative to horizontal. Enable to determine measurements to a precision degree.
The answer depends on the curvature relative to the size of the pentagon.
The angle of incidence and the angle of refraction, both measured relative to a normal to the surface