Answer:
3.462
Step-by-step explanation:
Answer:
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Step-by-step explanation:
Answer:
Step-by-step explanation:
AB and DC are parallel, so ∠B and ∠C are supplementary angles.
∠B = 180°-∠C = 79°
AD and BC are congruent. ∠A = ∠B = 79°
Planes DEC and BEC have the segment EC in common (notice how EC is in both triple letter sequence). This is where the two triangular parts join. This is known as an edge.
Answer: segment EC
