Given ABCD, find the measure of angle D. http://i.imgur.com/Rg0JZSn.png
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Question

anonymous · Answer

Welcome and congrats on asking your first question in mathematics!

anonymous · Answer

Thanks :)

anonymous · Answer

75 degrees

anonymous · Answer

x=9

anonymous · Answer

4x+69+30+5x=180
9x+99=180
9x=81
x=9

anonymous · Answer

Thank you for explaining!

anonymous · Answer

No problem. I wouldn't want to give you an answer without you knowing how I got it.

anonymous · Answer

Just remember a paralellogram has a total of 360 degrees. Both the top and bottom angle are th same. So one half of it is 180 degrees. So you'd add the to bottom equations and make it equal to 180, you then subtract the degrees you already know and divide by your X and it gives you X to plug in. therefor finding your angle measurement.