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For rectangle ABCD, find m∠DEC.
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For rectangle ABCD, find m∠DEC.

For rectangle ABCD, find m∠DEC.-example-1
User Jamie G
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1 Answer

2 votes

Answer:

∠DEC = 118°

Explanation:

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

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

User Abhinav Gujjar
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