Answer:
They don’t 12+16+20= 48
12 x 16 x 20= 3840
Step-by-step explanation:
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By the definition of a rectangle, JML and KLM are right angles.
From the information given, JKLM is a rectangle based on the definition as the opposite sides are equal.
Also, JML and KLM will be 90° since they're right angles. The opposite sides of a rectangle are congruent and equal.
Learn more about rectangles on:
brainly.com/question/25292087
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