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43 Cards in this Set
- Front
- Back
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right angle
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a 90 degree angle (the size of the corner of a sheet of paper)
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cube
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a special solid with 6 faces
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A polygon with 5 sides
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pentagon
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faces
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A flat polygon or the sides of a solid.
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scalene triangle
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all sides and angles of the triangle are different
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width
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How wide a figure is
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vertices
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3 or more lines that meet at a point.
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height
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how tall an object is
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equilateral triangle
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all 3 sides and angles are the same
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Three Dimensional Figures
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Solid figures that have height, width, and depth
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plane
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all the points that form a flat surface
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length
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how far back an object goes
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intersecting lines
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lines that meet or cross each other
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pi
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3.14, the ratio of the circumference of a cicle to the length of its diameter
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A polygon with 6 sides
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hexagon
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rectangular prism
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a solid
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point
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an exact location and shows where something stops
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width
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How wide a 3D figure is
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edges
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when 2 faces meet they form an edge.
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perpendicular
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lines that intersect and form square corners (straight up and down)
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A polygon with 7 sides
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heptagon
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acute angle
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an angle less than 90 degrees (smaller than the corner of a sheet of paper)
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A polygon with 8 sides
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octagon
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quadrilateral
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any shape that has 4 sides
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a polygon with 9 sides
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nonagon
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ray
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part of a line that has 1 endpoint
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A polygon with 10 sides
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decagon
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line
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a straight path that goes on forever in both directions
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flip
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to turn a figure over or change its position
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isosceles triangle
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triangle in which 2 sides are the same
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diameter
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a chord that passes through the center of the circle
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parallel lines
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2 lines that run side by side and never cross each other
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slide
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to move a figure without changing its size or shape
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obtuse angle
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greater than 90 degrees (larger than the corner of a piece of paper)
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turn
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to rotate a figure around a vertex (POSITION CHANGED, SIZE AND SHAPE DO NOT)
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line segment
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part of a line and it has 2 endpoints
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degree
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the unit name for measuring angles
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polygon
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is a closed figure
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chord
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a line that connects 2 points on the circle
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triangle
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has 3 sides and 3 angles
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congruent
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figures that have the same shape and size
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radius
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A line segment that connects the center with a point on the circle
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prism
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a solid figure that has 2 congruent faces
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