### Clarifications

*Clarification 1:* Instruction includes measuring given angles and drawing angles using protractors.*Clarification 2:* Instruction includes estimating angle measures using benchmark angles (30°, 45°, 60°, 90° and 180°).
*Clarification 3: *Instruction focuses on the understanding that angles can be decomposed into non-overlapping angles whose measures sum to the measure of the original angle.

**Subject Area:**Mathematics (B.E.S.T.)

**Grade:**4

**Strand:**Geometric Reasoning

**Standard:**Draw, classify and measure angles.

**Date Adopted or Revised:**08/20

**Status:**State Board Approved

## Related Courses

## Related Access Points

## Related Resources

## Formative Assessments

## Image/Photograph

## Lesson Plans

## Original Student Tutorials

## Tutorial

## MFAS Formative Assessments

Students are asked to analyze two angles and explain how their measures are determined.

Students are asked to draw and measure acute and obtuse angles whose vertices are at the center of a circle.

Students are asked determine angle measures based on how many one-degree turns are made.

Students are asked to use a protractor to determine the measure of four angles.

Students are given two angles with the same angle measure but with sides of different lengths and asked to explain which component of an angle determines its measure.

Students are asked to draw specified angles within a circle in the context of a real world problem.

Students use a protractor to draw angles with a specified measure.

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

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.

Discover what an angle is by helping to program a robot through an obstacle course in this interactive tutorial.

Learn how to measure angles with a protractor to help get a robot through an obstacle course in this interactive tutorial.

## 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

Learn how to measure angles with a protractor to help get a robot through an obstacle course in this interactive tutorial.

Type: Original Student Tutorial

Discover what an angle is by helping to program a robot through an obstacle course in this interactive tutorial.

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

## Parent Resources

## Image/Photograph

In this lesson, you will find clip art and various illustrations of polygons, circles, ellipses, star polygons, and inscribed shapes.

Type: Image/Photograph