Georgia standard · Mathematics

`3.GSR.8`Perimeter of Polygons

Determine the perimeter of a polygon presented in real-life, mathematical problems.

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Expectations

3.GSR.8.1
Determine the perimeter of a polygon and explain that the perimeter represents the distance around a polygon. Solve problems involving perimeters of polygons.
3.GSR.8.2
Investigate and describe how rectangles with the same perimeter can have different areas or how rectangles with the same area can have different perimeters.

Mathematics Grade 3 (EOG) · Geometric & Spatial Reasoning
Determine the perimeter of a polygon presented in real-life, mathematical problems.
about 14% of the test · 8 points These points are shared with other standards, so count them once and never add them up per standard.

Georgia's Achievement Level Descriptors. The levels are cumulative: each includes the ones before it. Proficient is on grade level.

Beginning: Know that perimeter is a measure of distance around a polygon.
Developing: Determine the perimeters of polygons with given side lengths.
Proficient: Solve real-life problems involving perimeters of polygons, including finding missing side lengths. Identify rectangles that have the same perimeter but different areas or the same area but different perimeters.
Distinguished: Solve complex multi-step problems involving the perimeters of polygons, and explain how rectangles can have the same perimeter but different areas or the same area but different perimeters.

Kindergarten · K.GSR.8
Identify, describe, and compare basic shapes encountered in the environment, and form two-dimensional shapes and three-dimensional figures.
Grade 3 · 3.GSR.8 (this standard)
Determine the perimeter of a polygon presented in real-life, mathematical problems.
Grade 4 · 4.GSR.8
Identify and draw geometric objects, classify polygons based on properties, and solve problems involving area and perimeter of rectangular figures.
Grade 5 · 5.GSR.8
Examine properties of polygons and rectangular prisms, classify polygons by their properties, and discover volume of right rectangular prisms.
Grade 8 · 8.GSR.8
Solve contextual, geometric problems involving the Pythagorean Theorem and the volume of geometric figures to explain real phenomena.