Report - 6.20 The Cosine Law.notebook - nowyoudothemath.weebly.com...6.20 The Cosine Law.notebook 3 May 29, 2020 r2 = p2 + q2 2pqcos(R) r2 = 132 + 152 2(13)(15)cos(70) r2 = 260.6121... r =

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