Know the formulas for the area and circumference of a circle and use them to solve problems

Start lessonBegins with Area circumference circles · Slides

Teacher tools for this standard

Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework

Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
Guided Notes →One page your students fill in and keep.
Exit Ticket →Three items at the end of class. No student accounts.
Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
Homework →Assign practice; it grades itself.

7.G.B.4

7.G.B.4 -- Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

What you'll learn

State the formula for circumference (C = pid = 2pir) and identify what each variable represents
State the formula for area of a circle (A = pir^2) and identify what each variable represents
Compute circumference and area given radius or diameter, using both exact (pi) and approximate answers
Informally describe why C = pid using the definition of pi as C/d
Solve real-world problems involving circumference and area of circles
Distinguish between circumference (a linear measure) and area (a square measure) and select the appropriate formula for a given context