Angles

Free!

Angles works as an interactive protractor that users can engage to measure the relationships between three points. When Angles is launched, users are presented with three points. Users are then able to position the three points to anywhere on the screen, and Angles will report the degree of the angle’s vertex.

Instructional Ideas

1. To build familiarity with angles, teachers can have students place different paper triangles on their tablet’s screen to measure the triangles’ angles. Teachers can label the triangles (e.g., Triangle 1, Triangle 2, and so on), and all the triangles should have the same measurement (e.g., all Triangle 1’s are 63 degrees, Triangle 2’s are 48 degrees, and so on). Next, teachers can ask all students to measure a specific triangle. Because all the Triangle 1’s have the same measurement, students should come to a common finding.
2. As homework, teachers can assign students to measure three objects in their house that share the same angle measurement. For example, students could measure the angle of a window, a door frame, and a cabinet. Next, students could compose a paragraph explaining why it is important that the angles are the same. Conversely, students could be required to find three objects in their house that have different angles and report those findings.
3. As a class activity, teachers can say a certain measurement, such as 43 degrees, and have students create that angle on their tablet. Once students create that angle, they have to hold up their tablet to show their teacher. This activity will reinforce students’ understanding of angles and degrees.

Screenshots

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