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21 Cards in this Set
- Front
- Back
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acute triangle
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A triangle with no angle measuring 90º or more.
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altitude
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The perpendicular distance from a vertex to the opposite side of a plane figure.
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base of a polygon
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The side of a polygon that is perpendicular to the altitude or height.
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compose
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To put together, as in numbers or shapes.
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equilateral triangle
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A triangle whose sides are all the same length.
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isosceles triangle
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A triangle that has at least two congruent sides.
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net
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A 2-dimensional shape that can be folded into a 3-dimensional figure is a net of that figure. (Also called
a network.) |
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obtuse triangle
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A triangle that contains one angle with a measure greater than 90º (obtuse angle) and two acute angles.
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polygon
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A closed figure formed from line segments that meet only at their endpoints.
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prism
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A 3-dimensional figure that has two congruent and parallel faces that are polygons. The remaining faces are
parallelograms. |
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pyramid
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A polyhedron whose base is a polygon and whose other
faces are triangles that share a common vertex. |
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quadrilateral
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A four-sided polygon.
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right rectangular prism
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A prism with six rectangular faces where the lateral edge is perpendicular to the plane of the base.
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right triangle
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A triangle that has one 90º angle.
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scalene triangle
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A triangle that has no congruent sides.
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solid figure
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A geometric figure with 3 dimensions.
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square-based pyramid
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A polyhedron whose base is a square and whose other faces are triangles that share a common vertex.
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surface area
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The total area of the faces (including the bases) and curved surfaces of a solid figure.
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three-dimensional
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3-D. Existing in 3 dimensions; having length, width, and
height. |
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triangular prism
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A prism with three rectangular faces and two triangular bases where the lateral edge is perpendicular to the plane of the base.
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triangular pyramid
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A pyramid with a triangular base.
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