–5y – 10 – 10y + –4y
1 answer:
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Congruent triangles have equal corresponding sides and angles.
- The measure of the side lengths are:
,
and
- The measure of the angles are:
,
and
The given parameters are:
means that triangles DEF and GHJ are congruent triangles.
So, we have:
This gives
Also, we have:
This gives
Also, we have:
This gives
The following angles are also congruent
This gives
Also, we have:
This gives
The measure of angle J is then calculated using
This gives
Subtract 139 from both sides
Read more about congruent triangles at:
