School Improvement in Maryland

Using the State Curriculum: Mathematics, Grade 7

Algebra | Geometry | Measurement | Statistics | Probability | Number | Processes

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Standard 2.0 Knowledge of Geometry

Topic A. Plane Geometric Figures

Indicator 2. Analyze geometric relationships

Objective a. Determine a missing angle measurement using the sum of the interior angles of polygons.

Assessment limit: Use angle measures in a quadrilateral

Extended Constructed Response (ECR) Item

Look at quadrilateral KLMN.

Step A
What is the measure of ∠M?

______________degrees

Step B

  • Use what you know about the angle measures of a quadrilateral to justify why the measure you determined for angleM is correct. Use words, numbers, and/or symbols in your justification.
  • A new quadrilateral KLMN is drawn so that the measures of ∠K and ∠L do not change, but angleM and ∠N are now congruent. Use what you know about the angles of a quadrilateral to explain how this change affects the measure of ∠M. Use words, numbers, and/or symbols in your explanation.
/toolkit/vsc/assessment_items/msa_math_7_032.xml

Correct Answer:
rubric

Assessment limit:
Use angle measures in a quadrilateral

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