Answer:
<h2>

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Step-by-step explanation:
Given,







Comparing with A • 
A = 
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Obtuse angle that’s the answer
Answer: 1 .Thus for a graph to have an Euler circuit, all vertices must have even degree. The converse is also true: if all the vertices of a graph have even degree, then the graph has an Euler circuit, and if there are exactly two vertices with odd degree, the graph has an Euler path.
2. A graph has an Euler circuit if and only if the degree of every vertex is even. A graph has an Euler path if and only if there are at most two vertices with odd degree.
Step-by-step explanation:
Can i have branily plz
<h2>
Answer: 
</h2>
Step-by-step explanation:
- Cross-multiply.
- Divide both sides by 9.
Answer:
-1
Step-by-step explanation:
20 / -1 = -20