Grade 4 - Angle Measurement Unit
Standards covered:
- 4.7 Geometry and measurement
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4.7A
Illustrate the measure of an angle as the part of a circle whose center is at the vertex of the angle that is "cut out" by the rays of the angle. Angle measures are limited to whole numbers.
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4.7B
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.
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4.7C
Determine the approximate measures of angles in degrees to the nearest whole number using a protractor.
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4.7D
Draw an angle with a given measure.
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4.7E
Determine the measure of an unknown angle formed by two non-overlapping adjacent angles given one or both angle measures.
The Angle Measurement Unit connects measurement to geometry in order to answer questions such as:
- What is an angle? How are angles measured? How is estimation used to measure angles?
- How are angle measures used to identify 2- and 3-dimensional geometric figures?
Summative Assessment Task
Given a picture of a protractor with several angels drawn on it, students determine three pairs of angles that would equal the sum of 140 degrees.
Instructional Tasks/Formative Assessments
Given the fact that if you hold your fist straight in front of you, the distance between the bottom of your fist and the top of your fist measures about ten degrees above the horizon, students determine if Jupiter will appear six fists above the horizon at 9 o'clock p.m.
Given a set of angles, students determine if two angles are acute angles.
Given one angle measurement, students determine the measurements of three other angles.
Using five different colors, students create a game spinner that gives each person playing the game a fair chance to win.
The N/A classification refers to TEKS Standards that cannot be assessed through problem solving.
For this reason, tasks have not been included for these particular standards.
K.7A K.7B K.9B K.9C K.9D