### Clarifications

**Geometry - Fluency Recommendations**

Fluency with the use of coordinates to establish geometric results, calculate length and angle, and use geometric representations as a modeling tool are some of the most valuable tools in mathematics and related fields.

**Subject Area:**Mathematics

**Grade:**912

**Domain-Subdomain:**Geometry: Expressing Geometric Properties with Equations

**Cluster:**Level 1: Recall

**Cluster:**Use coordinates to prove simple geometric theorems algebraically. (Geometry - Major Cluster) -

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

**Date Adopted or Revised:**02/14

**Date of Last Rating:**02/14

**Status:**State Board Approved

**Assessed:**Yes

**Assessment Limits :**

Items may require the use of the Pythagorean theorem.Items may include convex, concave, regular, and/or irregular

polygons.In items that require the student to find the area, the polygon must

be able to be divided into triangles and rectangles.**Calculator :**Neutral

**Clarification :**

Students will use coordinate geometry to find a perimeter of a

polygon.Students will use coordinate geometry to find the area of triangles

and rectangles.**Stimulus Attributes :**

Items must be set in a real-world context.**Response Attributes :**

Items may require the student to apply the basic modeling cycle.Items may require the student to use or choose the correct unit of

measure.Items may require the student to find a dimension given the

perimeter or area of a polygon.

**Test Item #:**Sample Item 1**Question:**Polygon ABCDE is shown on the coordinate grid.

What is the perimeter, to the nearest hundredth of a unit, of polygon ABCDE?

**Difficulty:**N/A**Type:**EE: Equation Editor

## Related Courses

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## Assessments

## Formative Assessments

## Lesson Plans

## Perspectives Video: Professional/Enthusiast

## MFAS Formative Assessments

Students are asked to find the perimeter of a pentagon given in the coordinate plane.

Students are asked to find the perimeter and the area of a rectangle given in the coordinate plane.

Students are asked to find the perimeter and the area of a right triangle given in the coordinate plane.

Students are asked to find the perimeter and area of an obtuse triangle given in the coordinate plane.