Math Lesson View

Lesson Purpose

To reinforce using a variable to solve for an unknown as a preface to more complex geometric concepts

Related Documents

Lesson Objectives

·         Recognize decomposed angles by calculating their separate parts

·         Use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.

Student Target

“I can work with segments of angles to determine measurement.”

CCR Focus Standards

Geometry - Level C

• 4.G.1

  Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

Supporting Standards

• 4.MD.6

  Measure angles in whole-number degrees using a protractor. Sketch angles of specified measure.
  

• 4.MD.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.
  

Standards for Mathematical Practice

• MP.5

  Use appropriate tools strategically. (MP.5)

• MP.7

  Look for and make use of structure. (MP.7)

KYAE Employability Standards