Sector Area
Lesson Prep
Lesson Details
Duration: 50 minutes
Learning Goal: Allow students to explore sector area before formally teaching it. Then, practice and spiral important concepts.
Prework
Make sure you have Chromebooks or some other class set of technology.
Classwork
Standards
Common Core
HSG.C.B.5 – Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constant of proportionality; derive the formula for the area of a sector.
TEKS
G.12(C) – apply the proportional relationship between the measure of the area of a sector of a circle and the area of the circle to solve problems
G.12(D) – describe radian measure of an angle as the ratio of the length of an arc intercepted by a central angle and the radius of the circle