Tennessee Law Enforcement Training Academy (TLETA) Week 10 Practice Test

Something on a surface has to be measured with ______ measurements.

Three measurements Two measurements Four measurements One measurement

Correct Answer:

Three measurements

Explanation:

Defining a surface in three-dimensional space requires three independent measurements because a plane is uniquely determined by three non-collinear points. Two measurements only fix a location along a line on the surface, but infinitely many planes can contain that line, so the exact surface isn’t uniquely identified. One measurement pinpoints a single point with no information about the surface’s orientation or location. With three independent measurements, you establish the plane itself, which then allows you to locate any specific point on that surface. Extra measurements can be used to check accuracy, but three are the minimal set needed to define the surface.

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