MD.3.7

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.

Assessment Banner - Assessment Questions Now Available!
Formative Assessments
Formative Assessments
Assessment Logo. Includes a gray clipboard on a blue background.
Students are asked to determine an unknown angle measure that is one component of a larger known angle when given the other component.
Turns on a Skateboard
Assessment Logo. Includes a gray clipboard on a blue background.
Students are asked to determine an unknown angle measure that is one component of a larger known angle when given the other components.
What is the Measure of the Angle
Assessment Logo. Includes a gray clipboard on a blue background.
Students are asked to recognize the additive nature of angles to determine an unknown angle measure.
Understanding Angles
Assessment Logo. Includes a gray clipboard on a blue background.
Students are asked to determine adjacent angle measurements using the additive structure of angle measurement and known angle measurements.
Using Known Angles
Virtual/Hands-on Manipulatives
Virtual/Hands-on Manipulatives
Virtual Manipulatives Logo includes a laptop on a yellow background.
CPALMS: This applet allows users to manipulate polygons (from triangles up to octagons) in order to find the relationship between the sum of the interior angles and the number of sides.
Angle Sums
Virtual Manipulatives Logo includes a laptop on a yellow background.
Students can use this virtual protractor to measure angles.
Measuring Angles
Assessment Questions
Assessment Questions
Assessments Logo. Includes 3 gray question marks on a purple background.
Click on this text to download this question.
Equation Editor 1
Assessments Logo. Includes 3 gray question marks on a purple background.
Click on this text to download this question.
Matching Item
Assessments Logo. Includes 3 gray question marks on a purple background.
Click on this text to download this question.
Equation Editor 2
Assessments Logo. Includes 3 gray question marks on a purple background.
Click on this text to download this question.
Multiple Choice
Videos of Expert Instruction
Videos of Expert Instruction
Use Real Link and Title
Use Real Link and Title
Use Real Link and Title
Hook/Performance Tasks
Hook/Performance Tasks
Achievement Level Descriptors Logo. Includes a dark gray document symbol on a yellow background.
The purpose of this task is to gain experience drawing and measuring angles, developing an understanding of the additive structure of angles.
IM:  Measuring Angles
Achievement Level Descriptors Logo. Includes a dark gray document symbol on a yellow background.
The purpose of this task is to give 4th grade students a problem involving an unknown quantity that has a clear visual representation.
IM:  Finding an Unknown Angle