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If JKLM is a trapezoid, which statements must be true? Check all that apply.

A. JK is perpendicular to KL.
B. J is congruent to K.
C. JK is parallel to LM.
D. KL is parallel to JM.
E. J is congruent to M.
F. J is supplementary to K.

Answer :

Certainly! Let's break down the problem and understand why certain statements about the trapezoid JKLM must be true.

A trapezoid is a quadrilateral with at least one pair of parallel sides. Now, let's examine each statement to see which are necessarily true for a trapezoid:

A. JK is perpendicular to KL:
- This statement is not necessarily true for a trapezoid. A trapezoid does not require any sides to be perpendicular unless specified.

B. J is congruent to 2K:
- This statement does not make sense in terms of congruency, as it seems to refer to angles or lengths in an unclear way. Hence, it's not necessarily true for a trapezoid.

C. JK is parallel to LM:
- This statement is true for a trapezoid because, by definition, a trapezoid must have at least one pair of parallel sides. If JKLM is a trapezoid, then either JK is parallel to LM or another pair is, but this statement could represent the necessary condition.

D. KL is parallel to JM:
- This is not necessarily true. A trapezoid only requires one pair of sides to be parallel. The other pair does not have to be parallel.

E. J is congruent to M:
- Angles J and M are not necessarily congruent in a general trapezoid. This would be true in the case of an isosceles trapezoid, but not all trapezoids are isosceles.

F. J is supplementary to K:
- This can be true if angles J and K are adjacent angles to the same base of a trapezoid. However, since this is not always the case, it is not guaranteed for every trapezoid.

Given these considerations, the only statement that must be true for any trapezoid JKLM is:

- C. JK is parallel to LM because a trapezoid requires at least one pair of parallel sides.

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