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Access Point #: MA.912.G.4.In.c (Archived
Access Point)
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Measure sides and angles of triangles to determine whether triangles are the same size and shape
(congruent) or the same shape, but different size (similar).
Number: MA.912.G.4.In.c
Category: Independent
Date Adopted or Revised: 09/07
Standard: Triangles : Identify and describe
various kinds of triangles (right, acute, scalene,
isosceles, etc.). Define and construct altitudes,
medians, and bisectors, and triangles
congruent to given triangles. Prove that
triangles are congruent or similar and use
properties of these triangles to solve problems
involving lengths and areas. Relate geometry
to algebra by using coordinate geometry to
determine regularity, congruence, and
similarity. Understand and apply the inequality
theorems of triangles.
Remarks/Examples:
Relates to using properties of congruent and similar triangles. Student may use measuring tools,
such as templates, protractors, and rulers. Student measures length of sides up to 12 inches and
angles using 5° increments.
Related Benchmarks
Name
MA.912.G.4.4:
Description
Use properties of congruent and similar triangles to solve
problems involving lengths and areas.
Remarks/Examples:
Example: Of two similar triangles, the second has sides half
the length of the first. The area of the first triangle is 20
. What is the area of the second triangle?
Prove that triangles are congruent or similar and use the concept
of corresponding parts of congruent triangles.
Remarks/Examples:
Example: Prove that triangles ABC and APQ are similar.
MA.912.G.4.6:
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.
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.