Section 1
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Perpendicular Faces
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Last updated
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Date created
Mar 14, 2020
Cards (71)
Section 1
(50 cards)
Perpendicular Faces
Faces that are at right angles (90°) to one another.
Triangular Pyramid
a pyramid that has a triangle at its base, all the other sides are also triangles. The triangles taper to a vertex (or apex).4 faces, 6 edges, 4 vertices.
Obtuse Angle
An angle that measures between 90° and 180°.
Square
A rectangle with all sides the same length.
Polyhedron
a solid with flat faces (from Greek poly- meaning "many" and -edron meaning "face"). Each face is a polygon (a flat shape with straight sides). So: no curved surfaces!
Parallelogram
A quadrilateral with both pairs of opposite sides parallel and equal in length.
Obtuse Triangle
A triangle in which one angle is an obtuse angle.
Face
A flat surface of a polyhedron.
Perpendicular Lines
Two lines that intersect to form right angles.
Parallel Lines
In a plane, lines that never cross and are the same distance apart.
Two-Dimensional Figure
A plane figure, it has length and width.
Line Segment
Part of a line having two endpoints.
Rhombus
A parallelogram with all sides the same length.
Scalene Triangle
A triangle in which no sides have the same length.
Sphere
A three-dimensional shape whose surface consists of all the points that are a given distance from the center of the shape.0 faces, 0 edges, 0 vertices.
Cylinder
2 faces, 0 edges, 0 vertices. A solid composed of two congruent circles in parallel planes, their interiors, and all the line segments parallel to the axis with endpoints on the two circles.
Octagon
A polygon with 8 sides.
Triangle
A polygon with three sides and three angles.
Ray
Part of a line that has one endpoint and extends forever in only one direction.
Straight Angle
An angle which measures 180°.
Polygon
A closed plane figure made up of line segments.
Rectangular Prism
A solid shape (3-dimensional) that has: 6 faces (4 rectangles & 2 squares), 8 vertices (corners), and 12 equal edges.
Parallel Edges
Edges in a polygon that are the same distance apart at every point.
Acute Triangle
A triangle in which all three angles are acute angles.
Perpendicular Edges
Edges that form right angles (90°) to one another.
Regular Polygon
A polygon that has sides of equal length and angles of equal measure.
Cube
A regular solid having six congruent square faces. 6 faces, 12 edges, 8 vertices.
Right Triangle
A triangle in which one angle is a right angle.
Degrees
A unit for measuring angles or temperatures.
Trapezoid
A quadrilateral that has exactly one pair of parallel sides.
Point
An exact location in space.
Quadrilateral
A polygon with 4 sides.
Hexagon
A polygon with 6 sides.
Protractor
An instrument used to measure and draw angles.
Congruent
If one shape can become another using Turns, Flips and/or Slides, then the shapes are Congruent: After any of those transformations (turn, flip or slide), the shape still has the same size, area, angles and line lengths.The two shapes need to be the same size to be congruent. When we need to resize one shape to make it the same as the other, the shapes are Similar.
Vertex (Vertices)
The point where two rays meet to form an angle. The points where the sides of a polygon meet. The points where three or more edges meet in a solid figure. The pointed part of a cone.
Edge
Where two faces meet.
Line
A straight path of points that goes on forever in two directions.
Pentagon
A polygon with five sides.
Equilateral Triangle
A triangle in which all three sides are the same length.
Parallel Faces
Faces in a polygon that are the same distance apart at every point.
Rectangle
A parallelogram with four right angles.
Triangular Prism
a solid figure with two triangular bases and three rectangular faces. 5 faces, 9 edges, 6 vertices.
Right Angle
An angle whose measure is 90°.
Attribute
A characteristic of a shape.
Isosceles Triangle
A triangle with two sides of the same length.
Acute Angle
An angle whose measure is between 0° and 90°.
Angle
A figure that is formed by two rays with the same endpoint.
Plane
An endless flat surface.
Cone
A three dimensional shape with a circular base and a vertex opposite the base.1 face, 0 edges, 0 vertices
Section 2
(21 cards)