Notes pages 1–3 equidistant center

center point equal congruent on the circle chord center twice 𝑑 = 2𝑟 half r= 𝑑 2

Circle E 4 4 𝐸𝐴 𝐸𝐶 𝐸𝐷 𝐸𝐵 4 𝐶𝐷 𝐴𝐵 𝐴𝐵 ED = 4

Circle E 6 6 𝐸𝐴 𝐸𝐶 𝐸𝐷 𝐸𝐵 6 𝐶𝐷 𝐴𝐵 𝐴𝐵 ED = 4 AB = 12

the same radius center Target similar

perimeter 𝐶 =𝜋𝑑 𝐶 =2𝜋𝑟

𝐶 =𝜋𝑑 𝐶 =𝜋20 20𝜋 62.83 62.8318… exact rounded

𝐶 =𝜋𝑑 𝐶 =𝜋____ 𝐶 =𝜋𝑑 𝐶 =𝜋20 20𝜋 62.83 13 C=13𝜋 x a2 + b2 = c2 52 + 122 62.8318… exact rounded 169 = x2 13 = x

𝐶 =𝜋𝑑 𝐶 =𝜋____ 𝐶 =𝜋𝑑 𝐶 =𝜋20 20𝜋 62.83 C 𝐶 =𝜋𝑑 ___ =𝜋___ 85 d d =____ 13 𝐶 =𝜋𝑑 C=13𝜋 x a2 + b2 = c2 𝐶 =𝜋20 52 + 122 = x2 20𝜋 62.83 62.8318… exact rounded 169 = x2 13 = x C 𝐶 =𝜋𝑑 ___ =𝜋___ 85 d d =____ 27.06 d 𝜋 𝜋 r= 𝑑 2 r= 2 27.06 r=____ 13.53 r

Homework pages 1–2