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Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure.
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.
- Assessment Limits :
Whole number degree measures, sums, and differences may only be within 0° and 360°. - Calculator :
No
- Context :
Allowable
- Test Item #: Sample Item 1
- Question:
What is them measure of the unknown angle?
- Difficulty: N/A
- Type: MC: Multiple Choice
- Test Item #: Sample Item 2
- Question:
Kyle is adding angles to create other angles.
Fill in the circles to select the angles Kyle can use to create a 128º angle.
Fill in the circles to select the angles that Kyle can use to create a 55º angle.
- Difficulty: N/A
- Type: MI: Matching Item
- Test Item #: Sample Item 3
- Question:
A diagram is shown.
What is the sum of all the angles that are labeled?
- Difficulty: N/A
- Type: EE: Equation Editor
- Test Item #: Sample Item 4
- Question:
What is the measure, in degrees (º), of the missing angle?
- Difficulty: N/A
- Type: EE: Equation Editor
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Formative Assessments
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Lesson Plans
Original Student Tutorials
Tutorial
MFAS Formative Assessments
Students are asked to determine an unknown angle measure that is one component of a larger known angle when given the other component.
Students are asked to recognize the additive nature of angles to determine an unknown angle measure.
Students are asked to determine adjacent angle measurements using the additive structure of angle measurement and known angle measurements.
Students are asked to determine an unknown angle measure that is one component of a larger known angle when given the other components.
Original Student Tutorials Mathematics - Grades K-5
Are you up for a challenge? You will use tile designs to explore how angles can be decomposed into smaller angles and how those parts can be shown as addends in equations in this interactive tutorial.
Note: this tutorial exceeds clarification limits and is meant as enrichment for students who met the standards to increase problem-solving skills.
Decompose and compose various angles while exploring clocks and windows in this interactive tutorial.
Note: this tutorial exceeds clarification limits and is meant as enrichment for students to improve their problem-solving skills.
Student Resources
Original Student Tutorials
Decompose and compose various angles while exploring clocks and windows in this interactive tutorial.
Note: this tutorial exceeds clarification limits and is meant as enrichment for students to improve their problem-solving skills.
Type: Original Student Tutorial
Are you up for a challenge? You will use tile designs to explore how angles can be decomposed into smaller angles and how those parts can be shown as addends in equations in this interactive tutorial.
Note: this tutorial exceeds clarification limits and is meant as enrichment for students who met the standards to increase problem-solving skills.
Type: Original Student Tutorial
Tutorial
This Khan Academy tutorial video presents the strategy for finding the measure of one of two adjacent angles, when the sum of both and measure of one are known.
Type: Tutorial
