ab = x + 20
dc = 5x
ad = x − 2
bc = ?

quadrilateral abcd is a parallelogram if both pairs of opposite sides are congruent. show that quadrilateral abcd is a parallelogram by finding the lengths of the opposite side pairs. what is the length of bc?
a) 2
b) 3
c) 6
d) 9

BC=3 units

Step-by-step explanation:

Parallelograms

We are told that quadrilateral ABCD is a parallelogram because both pairs of opposite sides are congruent. This means AB=CD. We also know

Using the condition AB=CD

Knowing the value of x, we can say

BC must be equal to AD

We can see AB=5+20=25, and that DC=5(5)=25. All pairs of opposite sides are congruent

i believe the answer is c.

$6.42

step-by-step explanation: