6th grade math HELP
posted by Rachael .
You have a triangle that measures 180 degrees. AB is 4 units. the measure of BC is 5 units. The measure of CD is 12 units. What is the measure of DE and how did you get that answer?

Your question is not clear to me.
The statement "You have a triangle that measures 180 degrees. " makes no sense, every triangle has an angle sum of 180°.
Where are A,B,C,D, andE ? 
what is the perimeter of a triangle whose sides measure 15cm, 17cm, and 10cm?

I need help with definding classify

180
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