2. Quick Start Expectations 1.Fill in planner and HWRS HW: WS: Circles: Area & Circumference + SBAC practice 2.Get a signature on HWRS 3.On desk: journal, vocab toolkit, LS packet, calculator 4.Warm Up: (back of HWRS) 1) Solve the equation: -3(m - 2) = 12 -3m + 6 = 12 - 6 = - 6 -3m = 6 ÷ -3 ÷ - 3 m = - 2 2) Find the circumference if the radius is 4.5 in. Formula: C = d(3.14) d = 2r C = 2(4.5) (3.14) C = 9(3.14) C = 28.26 in.

3. p. 52

5. p. 54 To answer that let’s look at how the area of a circle relates to the area of a square…

6. p. 54

8. A = The area of a circle will be about 3 times the area of the radius square. Formula… = A Add Area of a circle to your Vocab Toolkit

9. 9”12”15” What is the area of each pizza? If the pizzas cost: 9” - $6, the 12” - $10, 15” - $15, which pizza is the best value? Why? 4.5 x 4.5 x 3.14 = 63.59 in² 6 x 6 x 3.14 = 113.04 in² 7.5 x 7.5 x 3.14 = 176.63 in²

10. A fun way to remember formulas for circumference and area of a circle…

11. HW: WS - Circles: Area & Circumference + SBAC practice