1. Lesson 6-1 Circles
Obj: I can find the circumference and area of circles HWK: p all, even, 23 Vocab: 1) circle 2) radius 3) diameter 4) circumference

2. Formulas
Circumference Area C = π d A = π r² or C = 2 π r

3. Find the circumference and area of each circle
Find the circumference and area of each circle. Give answers in terms of π and rounded to nearest tenth. Use 3.14 for π.
Ex 1)
5 cm

4. Ex 2)
4.5 in

5. Ex 3) Graph the circle with center (2, -2) that passes through (0, -2).

6. Ex 4) A Ferris wheel has a diameter of 56 feet and makes 15 revolutions per ride. How far would someone travel during the ride? Use for π.

7. Find the radius of each circle with the given measurements.
Ex 5) C = 12.8 π cm Ex 6) A = π m²

8. Ex 7) Find the area of the shaded region. Use 3.14 for π.
8 yd