Protractor (Angle Meter)—Tool to measure degrees and radians for iPhone, iPod touch, and iPad (supports iPad mini and retina display)

Protractor is designed to measure an angle’s degrees. With Protractor, users align the vertex with each ray that forms the angle. Once aligned, Protractor displays the interior and exterior degrees of the angle to the tenth decimal place.

Instructional Ideas

1. Teachers can have students create different degrees of angles with this app to build their familiarity of how a protractor functions.
2. Students can draw different angles on a piece of paper and then cut out each angle. Next, students can measure the degree of the angles by placing them on their iPad’s screen, matching the vertices together, and matching the rays together. Finally, with this app, students would be able to measure the degree of the different angles.
3. To review angle types, teachers could have all their students in a class launch this app. Next, teachers could say the name of a type of angle (e.g., acute, obtuse, right, straight, etc.) and students would have to create that angle on their iPad using this app. While students are creating their angles, teachers could walk around the room and check their students’ work.

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