Final answer:
Two true statements about lines A, B, and C given that angles d and h are 90 degrees are that line C is perpendicular to line B, and line A is parallel to line B. These conclusions assume no contradictory information from other statements or diagrams.
Step-by-step explanation:
Based on the given descriptions for lines A, B, and C, we can determine two true statements when m∠d = 90° and m∠h = 90°. Statement B implies that line C is perpendicular to line B, which is indicated by the fact that they form a 90° angle with each other, satisfying the definition of perpendicular lines.
Statement C suggests that line A is parallel to line B, which can be concluded if they are both increasing or decreasing lines without intersecting. In contrast, if the lines were perpendicular as one might infer from other statements, they would intersect at a 90° angle, contradicting their supposed parallel nature.
However, these conclusions are drawn with an assumption that other information provided does not conflict with the statements B and C. But without a specific diagram or more context, these assumptions can only be tentative.
Parallel and perpendicular lines are two important concepts in geometry. Parallel lines are the lines that never intersect each other. Thus, two parallel lines always maintain a constant distance between them. Perpendicular lines are the two lines that intersect each other at a right angle.