No product results in -1, hence δlmn is NOT a right triangle showing that lydia's assertion is incorrect
<h3>Perpendicular lines</h3>
In order to determine whether triangle lmn is right-angled, we need to determine the slope of lm, ln, and mn first as shown:
For the slope of lm:

For the slope of ln:

For the slope of mn:

- If any of the two lines is perpendicular, hence the triangle lmn is right-angled.
- To check, we will take the product of the slopes and see if it is equivalent to -1.
Product of slope lm and ln

Since no product results in -1, hence δlmn is NOT a right triangle showing that Lydia's assertion is incorrect
Learn more on slopes here: brainly.com/question/3493733
In the case above, Smith does not need anything, or nothing is required to occur to establish a PMA.
<h3>What is an advancement exam?</h3>
An advancement exam is known to be one that gives an unbiased factor in regards to the Final Multiple Score (FMS) algorithm and it is said to help in the rank order of qualified candidates in terms of advancement consideration.
Hence, In the case above, Smith does not need anything, or nothing is required to occur to establish a PMA.
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po3 Smith is elligible to take the po2 advancement exam. The only evaluation he received in his current paygrade is a frocked evaluation. what, if anything, is required to occur to establish a pma.
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Answer:
What is the real meaning of this questions