(01.01 MC) Part A: An angle is two collinear rays with a common endpoint. Find an example that contradicts this definition. How would you change the definition to make it more accurate? (5 points)

Part B: Give an example of an undefined term and how it pertains to angles. (5 points)

A fourth undefined term, set, is used in both geometry and set theory.

Even though these four terms are undefined, they can still be described. Mathematicians use descriptions of these four terms and work up from them, creating entire worlds of ideas like angles, polygons, Platonic solids, Cartesian graphs, and more.

Step-by-step explanation:

Simply because these terms are formally undefined does not mean they are any less useful or valid than other terms that emerge from them. These four undefined terms are used extensively in theorems, proofs, and defining other words.

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step-by-step explanation:

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i think the answer is b