Answer:
i think its b but im not sure
Step-by-step explanation:
Vertex is located over the center of the base of a regular pyramid.
<h3>
What is Vertex Angle?</h3>
Vertex angle is defined as the angle formed by two lines or rays that intersect at a point. These two rays make the sides of the angle.
Here, Vertex is the point which is located over the center of the base of a regular pyramid.
Learn more about Vertex angle from:
brainly.com/question/2028172
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b=3
I found this out by subtracting and adding on both sides.
Answer:
420
Step-by-step explanation: