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Access Point #: MA.912.G.2.In.c (Archived
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Identify triangles and rectangles that are the same shape and size (congruent) and same shape, but
not same size (similar) using physical and visual models.
Number: MA.912.G.2.In.c
Category: Independent
Date Adopted or Revised: 09/07
Standard: Polygons : Identify and describe
polygons (triangles, quadrilaterals, pentagons,
hexagons, etc.), using terms such as regular,
convex, and concave. Find measures of angles,
sides, perimeters, and areas of polygons,
justifying the methods used. Apply
transformations to polygons. Relate geometry to
algebra by using coordinate geometry to
determine transformations. Use algebraic
reasoning to determine congruence, similarity,
and symmetry. Create and verify tessellations of
the plane using polygons.
Related Benchmarks
Name
MA.912.G.2.3:
Description
Use properties of congruent and similar polygons to solve
mathematical or real-world problems.
Remarks/Examples:
Example: Suppose a building is in the shape of a regular hexagon. The
architect wants to put walkways as indicated. Show that the triangles
formed are equal in size and shape.
Use coordinate geometry to prove properties of congruent, regular
and similar polygons, and to perform transformations in the plane.
Remarks/Examples:
MA.912.G.2.6:
Example: Draw the polygon defined by the following vertices (
1, 3), ( -1, 3), (3, 1), (-3, 1), (1, -3), (-1, -3), (-3, -1), (3, -1). Is
this polygon regular? Justify your answer.
Example: Is the polygon formed by connecting the points (2,
1), ( 6, 2), (5, 6), and (1, 5) a square? Justify your answer.
Related Resources
Image/Photograph
Name
Clipart: Geometric Shapes:
Description
In this lesson, you will find clip art and various illustrations of
polygons, circles, ellipses, star polygons, and inscribed shapes.
Video/Audio/Animation
Name
Description
This video is meant to be a fun,
hands-on session that gets
students to think hard about how
machines work. It teaches them
MIT BLOSSOMS - Using Geometry to Design Simple Machines: the connection between the
geometry that they study and the
kinematics that engineers use -explaining that kinematics is
simply geometry in motion.
Parent Resources
Name
Clipart: Geometric Shapes:
Description
In this lesson, you will find clip art and various illustrations of
polygons, circles, ellipses, star polygons, and inscribed shapes.