Answer:
Just QT and UX
Step-by-step explanation:
QT and TX intersect and are not parallel.
QU and ST are not parallel or intersecting.
QT and WX are not parallel or intersecting.
QT and UX are parallel.
the plane is not horizontal and cross-section is not reach cone's base inside. so, the cross-section is an ellipse.
B)
The <u>sum</u> of the<u> measures</u> of the <u>interior angles</u> of the <u>triangle</u> is equal to 180°.
1. For the first triangle,

Then

2. For the second triangle,

Then

Now you see that

Answer: correct choice is C
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