Circles Introduction
Lesson Prep
Lesson Details
Duration: 50 minutes
Learning Goal: Introduce circles with an engaging task that leads to learning about central angles and properties of major and minor arcs.
Prework
Make sure you have Chromebooks or some other class set of technology.
Consider joining our free online workshop to explore 3 Act Math more in depth
Watch the following videos to learn more about our retake policy and how we go over quizzes
Classwork
3 Act Math - Captain’s Wheel
2nd page inspired by Dan Meyer
Use these slides for 2nd page
Go over Concept Quiz
Students complete this analysis handout in order to prepare for a retake.
Standards
Common Core
HSG.C.A.2 – Identify and describe relationships among inscribed angles, radii, and chords. Include the relationship between central, inscribed, and circumscribed angles; inscribed angles on a diameter are right angles; the radius of a circle is perpendicular to the tangent where the radius intersects the circle.
TEKS
G.12(A) – apply theorems about circles, including relationships among angles, radii, chords, tangents, and secants, to solve non-contextual problems
G.12(B) – Apply the proportional relationship between the measure of an arc length of a circle and the circumference of the circle to solve problems