TEKS 4.7D: Draw Angles
Draw Angles on a Protractor
About this lesson
Learning Target: I can draw an angle with a given measurement using a protractor.
Focuses On:
- Constructing a second ray so that, together with the given ray at zero degrees, it forms an angle that matches the given measurement
- Constructing a second ray so that, together with the given ray not at zero degrees, it forms an angle that matches the given measurement
Builds On:
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.
4.7B:
Illustrate degrees as the units used to measure an angle, where 1/360 of any circle is 1 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.
4.7C:
Determine the approximate measures of angles in degrees to the nearest whole number using a protractor.
Next Level:
5.5A:
Classify two‐dimensional figures in a hierarchy of sets and subsets using graphic organizers based on their attributes and properties.
Read More:
This lesson is designed to support student understanding of protractors and how they can be used to draw angles.
The two instructional blocks in this lesson are drawing from zero and drawing angles.
In the first instructional block, students are asked to construct a second ray on a protractor, so that, together with the given ray at zero degrees, it forms an angle that matches the given measurement.
The second instructional block increases in difficulty as students are then asked to complete the same process, but the given ray on the protractor does not cross zero degrees.
All angle measurements in this lesson are limited to multiples of 5. Measurements are made on both the left and right side of the protractor.
Visual representations of protractors are built into the lesson to support student understanding.
Grade 4MathTEKS 4.7D