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

Work through problems with immediate feedback

Fluency Practice

In parallelogram $ABCD$ , it is given that $AB = 7$ cm and $BC = 4$ cm. What are the lengths of $CD$ and $DA$ ?

$CD = 4$ cm, $DA = 7$ cm

$CD = 7$ cm, $DA = 4$ cm

$CD = 7$ cm, $DA = 7$ cm

$CD = 4$ cm, $DA = 4$ cm