Measuring angles in using protractor and identifying the types of angles in a figure. Evaluating or calculating the measure of composite or decomposed angles and applying the same to word problems.
Mapped to CCSS Section# 4.MD.C.6, 4.MD.C.7, 4.MD.C.5b, 4.MD.B.4
Measure angles in whole-number degrees using a protractor. Sketch angles of specified measure.,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.,An angle that turns through n one-degree angles is said to have an angle measure of n degrees.,Make a line plot to display a data set of measurements in fractions of a unit (1/2, 1/4, 1/8). Solve problems involving addition and subtraction of fractions by using information presented in line plots. For example, from a line plot find and interpret the difference in length between the longest and shortest specimens in an insect collection.
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