Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they, and how might you define them?
(i) parallel lines
(ii) perpendicular lines
(iii) line segment
(iv) radius of a circle
(v) square
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Answer:
- Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect.
- Perpendicular lines are lines that intersect at a right (90 degrees) angle.
- A line segment is a straight line that passes through the two points.
- radius of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.
- A square is closed, two-dimensional shape with 4 equal sides. A square is a quadrilateral. We can find the shape of a square in a game board or chess board, a wall clock and in a slice of bread, around us
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Answer:
PARALLEL LINES : Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect.
PERPENDICULAR LINES : Perpendicular lines are defined as two lines that meet or intersect each other at right angles (90°).
LINE SEGMENT : Line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints
RADIUS OF A CIRCLE : The radius of a circle is the length of the line from the center to any point on its edge.
SQUARE : Square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles)
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