2 Answers

Orenshi · Answer 1 · 2019-10-03T20:21:54+0000

First off, we need to understand that congruent means that the lines will have the same length.

As there are congruency markings at segment BD and at segment DC, BD and DC have the same length.

Therefore, when BD=18, DC would be 18 units as well.

We can then find the length of BC, which is BD+BC.

The length of BC:

18+18

=36units

Therefore the answer is 36 units.

Hope it helps!

Jeremy Cade · Answer 2 · 2019-10-07T18:32:21+0000

Answer:
$\overline{BC}=36\text{ units}$

Explanation:

Given :
$\overline{BC}$ with point D between points B and C.

Also,
$\overline{BD}\cong\overline{DC}$

We know that the measurement of congruent line segments are equal.

Therefore,

$\text{Length of }\overline{DC}=\text{Length of }\overline{BD}=18\text{ units}$

Now,
$\overline{BC}=\overline{BD}+\overline{DC}$

$\Rightarrow\overline{BC}=18+18=36\text{ units}$

Hence,
$\overline{BC}=36\text{ units}$

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