Back to Prove theorems about parallelograms — Problem 3 · Task Set 11
Exercises: Prove Theorems About Parallelograms
Work through each section in order. Show all proof steps and justifications where indicated.
Grade 9·21 problems·~30 min·Common Core Math - HS Geometry·standard·hsg-co-c-11
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A
Warm-Up: Review What You Know
These problems review skills from earlier in the course that you will need for parallelogram proofs.
1.
In , which reason justifies concluding that ?