Homework Help: geometry

Posted by emergency!!! 33 on Monday, February 11, 2013 at 1:26am.

ABCD is a rectangle. On line segment AB, E is a point such that ∠ADE=17∘ and ∠BCE=29∘. What is the measure of ∠DEC (in degrees)?

geometry - Steve, Monday, February 11, 2013 at 4:55am
∠ADE = 90-17 = 73°
∠ECD = ∠CEB = 29°
∠DEC = 180 - (73+29) = 78°

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