emilystar123 emilystar123

16-03-2021
Mathematics

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For rectangle ABCD, find m∠DEC.

For rectangle ABCD find mDEC class=

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thebecks thebecks

16-03-2021

Answer:

∠DEC = 118°

Step-by-step explanation:

∠ECD = ∠EDC = 31° (ΔDRC is isosceles because ED = EC)

∠DEC = 180° - 31° - 31° = 118° (all triangle interior angles add up to 180°)

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