4.2.3: Measurement: Investigate measurement using a variety of tools, units, systems, processes and techniques in various cultures. Explain and reason with attributes, estimations and formulas to communicate measurement(s) and relationships effectively. Justify decisions and consider the reasonableness of the measurement.

Measurement: Investigate measurement using a variety of tools, units, systems, processes and techniques in various cultures. Explain and reason with attributes, estimations and formulas to communicate measurement(s) and relationships effectively. Justify decisions and consider the reasonableness of the measurement.

4.2.3.01Classify angles as acute, right and obtuse by estimation, comparison with a right angle and by measurement.4.2.3.02Determine lengths to the nearest sixteenth of an inch when measuring with inches and to the nearest tenth of a centimeter when measuring in centimeters.4.2.3.03Measure angles with a protractor.4.2.3.04Determine the perimeter and area of two-dimensional figures and label with appropriate units.4.2.3.05Find the areas of geometric figures that can be decomposed into rectangular shapes using tools like dot or grid paper. Label area measurements using square units.4.2.3.06Explain why the area of a rectangle can be calculated by multiplying the length by the width and use the formula A = l x w to calculate the area of rectangles with whole number side lengths.4.2.3.07Make change up to $20 with place values, using $ and ¢ symbols appropriately.
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