Use the image to answer the question.
An illustration shows two parallel slanting lines m and l intersecting a vertical line k. The angles formed at the intersection of lines l and k are 1, 2, 4, and 3. The angles 1 and 4 are opposite to each other while angles 2 and 3 are opposite to each other. The angles formed at the intersection of lines m and k are 5, 6, 8, and 7. The angles 5 and 8 are opposite to each other while angles 6 and 7 are opposite to each other.
If m∠6=140° , what is m∠7 ?
(1 point)
Responses
180°
180 degrees
140°
140 degrees
40°
40 degrees
50°
50 degrees
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From the image and the given information, we can see that angles 6 and 7 are opposite to each other. This means that they are congruent, or have the same measure.
Since m∠6 is given as 140°, that means m∠7 must also be 140°.
Therefore, the answer is 140°.