If sides bd and dc have the same length, what is the length of side bc?

The length of side BC is:

                        2 units.

In the right angled triangle BAD we will use the Pythagorean Theorem as:

Also, it is given that sides BD and DC have the same length.

i.e.

Hence, in right angled triangle i.e. ΔBDC we will again use the Pythagorean Theorem as:

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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