**Texas Essential Knowledge and Skills (TEKS)**. A mean of a group of numbers is the average of those numbers. Read More...

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TX. 111. 6. Grade 4, Adopted 2012.

4.5. Algebraic reasoning. The student applies mathematical process standards to develop concepts of expressions and equations. The student is expected to:

4.5 (D) Solve problems related to perimeter and area of rectangles where dimensions are whole numbers.

4.6. Geometry and measurement. The student applies mathematical process standards to analyze geometric attributes in order to develop generalizations about their properties. The student is expected to:

4.6 (A) Identify points, lines, line segments, rays, angles, and perpendicular and parallel lines.

4.6 (D) 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.

4.7. Geometry and measurement. The student applies mathematical process standards to solve problems involving angles less than or equal to 180 degrees. The student is expected to:

4.7 (B) Illustrate degrees as the units used to measure an angle, where 1/360 of any circle is one degree and an angle that "cuts" n/360 out of any circle whose center is at the angle's vertex has a measure of n degrees. Angle measures are limited to whole numbers.

4.7 (C) Determine the approximate measures of angles in degrees to the nearest whole number using a protractor.

4.9. Data analysis. The student applies mathematical process standards to solve problems by collecting, organizing, displaying, and interpreting data. The student is expected to:

4.9 (B) Solve one- and two-step problems using data in whole number, decimal, and fraction form in a frequency table, dot plot, or stem-and-leaf plot.