Okay so there is a maximum on the thing it is a parallelogram I couldn't write it because I was over the max. Doing extra credit and using a parallelogram which is aactually kinda like 2 parallelograms (if you wanted to make sure if you drew it right) just someone please help IDK what to do!
in Geometry Answers by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer


So AD=FE=BC=9 and AB=DC. More info is needed! Let's say AB=a, a known quantity. We also need an angle. Let's pick A=x, another known quantity. The other angles will be: B=180-x=D and C=x. By the cosine rule, in triangle ACD, AC^2=AD^2+DC^2-2AD.DCcosD. So AC^2=81+a^2-18acos(180-x)=81+a^2+18acosx. AC=sqrt(81+a^2+18acosx).

Put x=60° and a=18, then AC=sqrt(81+324+162)=sqrt(567)=9sqrt(7)=23.81.

by Top Rated User (1.0m points)

Related questions

1 answer
1 answer
2 answers
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
87,124 questions
96,997 answers
24,433 users