Playing with Constructions - Flash Cards
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What is a compass used for in constructions?
A compass is a tool used to draw arcs and circles by keeping one point fixed and rotating the pencil around it.
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What is a circle?
A circle is a shape consisting of all points that are a fixed distance from a center point, called the radius.
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What is the radius of a circle?
The radius is the distance from the center of the circle to any point on its circumference.
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How do you construct a circle using a compass?
Fix the compass at the center, set the desired radius, and rotate the compass to draw the circle.
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What are the properties of a rectangle?
A rectangle has opposite sides equal in length and all angles measuring 90 degrees.
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What makes a square special?
In a square, all sides are equal in length, and all angles measure 90 degrees.
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How can you name a rectangle?
A rectangle can be named using its corners in the order of travel; examples include ABCD or DCBA.
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Does rotating a square change its properties?
No, rotating a square does not change its side lengths or angle measures; it remains a square.
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How do you construct a square of 6 cm?
Using a compass or ruler, construct four equal sides, each measuring 6 cm, and ensuring all angles are 90 degrees.
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What does equidistant mean?
Equidistant means being at the same distance from two or more points.
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How do you construct a house outline?
Identify corners and use a compass to ensure walls are equal lengths; construct the outline using straight lines.
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What are the diagonals in a rectangle?
The diagonals are line segments connecting opposite corners of the rectangle.
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When are points X and Y closest in a rectangle?
X and Y are closest when they are aligned vertically or horizontally along the rectangle's sides.
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Why use a ruler with a compass?
A ruler provides straight edges while a compass draws arcs and circles, ensuring precise constructions.
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What is a common mistake when using a compass?
A common mistake is not keeping the compass point fixed while rotating, leading to inaccurate circles.
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What is important about construction order?
The order of drawing affects the accuracy; always start with the base shape and build upon it.
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How do you construct a half circle?
Use the radius in the compass, set it at the center, and draw only a semi-circle arc.
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What is the unit of length used in constructions?
Commonly used units include centimeters (cm) and meters (m) for measuring lengths.
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Can sides of a rectangle be equal?
A rectangle cannot have all sides equal; if so, it becomes a square.
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What shapes can be drawn with straight lines?
Shapes such as triangles, rectangles, and squares can be drawn using straight lines.
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