Lesson 6-1 Circles Obj: I can find the circumference and area of circles HWK: p 264 1-6 all, 16-20 even, 23 Vocab: 1) circle 2) radius 3) diameter 4)

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Lesson 6-1 Circles Obj: I can find the circumference and area of circles HWK: p 264 1-6 all, 16-20 even, 23 Vocab: 1) circle 2) radius 3) diameter 4) circumference

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

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

Ex 2) 4.5 in

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

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 22 7 for π.

Find the radius of each circle with the given measurements. Ex 5) C = 12.8 π cm Ex 6) A = 136.89 π m²

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