4th Grade Math Unit 7

Big Idea:

Classify two-dimensional shapes based on their attributes (sides and angles).

Student Expectations:

Priority TEKS

4.6(D) [Readiness] classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines or the presence or absence of angles of a specified size

Focus TEKS

4.6(A) [Supporting] identify points, lines, line segments, rays, angles, and perpendicular and parallel lines

4.6(B) [Supporting] identify and draw one or more lines of symmetry, if they exist, for a two-dimensional figure

4.6(C) [Supporting] apply knowledge of right angles to identify acute, right, and obtuse triangles

Ongoing TEKS

4.1(A) [Tools to Know] apply mathematics to problems arising in everyday life, society, and the workplace;

4.1(B) [Tools to Know] use a problem-solving model that incorporates analyzing given information, formulating a plan or strategy, determining a solution, justifying the solution, and evaluating the problem-solving process and the reasonableness of the solution;

4.1(C) [Tools to Know] select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems

4.1(D) [Ways to Show] communicate mathematical ideas, reasoning, and their implications using multiple representations, including symbols, diagrams, graphs, and language as appropriate;

4.1(E) [Ways to Show] create and use representations to organize, record, and communicate mathematical ideas;

4.1(F) [Ways to Show] analyze mathematical relationships to connect and communicate mathematical ideas; and

4.1(G) [Ways to Show] display, explain, and justify mathematical ideas and arguments using precise mathematical language in written or oral communication.

Student Learning Targets:

• I will identify points, lines, line segments, rays, and angles.
• I will identify perpendicular and parallel lines.
• I will classify two-dimensional shapes based on its sides and angles.
• I will identify the measure of an angle on a given protractor.
• I will identify and draw the lines of a symmetry in a given shape.
• I will identify acute, right, and obtuse triangles.
• I will determine the measure of an unknown angle of two adjacent angles.

Essential Questions:

• How do you solve for a given measure in the middle of the protractor?
• How can you look at a shape’s sides and/or angles to classify that shape?
• What does it mean for a shape to be symmetrical?
• How can you look at the angles of a triangle to classify it?

Extra Information:

Adopted Textbook: Pearson - enVision Math

District Grading Policy

Texas Gateway Online Resource Center