A. See image below for missing vertex label
B. The triangles have neither a common side nor a common angle (option C)
What is a angle?
In geometry, an angle emerges when two rays or lines converge at a shared endpoint known as the vertex. These angles are commonly measured in degrees (°) or radians (rad) and serve as a means to gauge the extent of separation or rotation between the rays.
These measurements span a spectrum, beginning at 0 degrees, where the rays align, forming a straight line, and extend up to 360 degrees, symbolizing a complete revolution around the vertex. Angles surpassing 360 degrees denote more than one full rotation.