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Geometry Study Guide
SOLs 3.18, 3.19, 3.20
Plane Figures- two-dimensional figures (circle,
square, rectangular, and triangle)
Solid Figures- three-dimensional figures
(cube, rectangular solid (prism), square
pyramid, sphere, cone, and cylinder)
LINES AND ANGLES
Line- continues forever at both ends
Line segment- endpoints at each end
• A face is a polygon that serves as one side
of a three-dimensional figure
• An edge is the line segment where two
faces of a three-dimensional figure meet.
Ray- endpoint at one end, goes on forever at
the other end
• A corner is the point at which three or
more edges meet.
EXAMPLES OF SOLIDS
Parallel Lines- lines never touch
Cube
Intersecting Lines- lines cross at one point
Cylinder
Cone
Rectangular
Prism
Right Angle
Acute Angle
(square angle)
(less than a)
right angle)
Obtuse Angle
(greater than a
right angle)
Congruent- figures have exactly same size
and shape
Sphere
Pyramid
Symmetry- when the halves of
both sides of a line match in size
and shape
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