Two sides of a parallelogram measure 15 cm and 20 cm, and one of the diagonals measures 19 cm. What are the measures of the angles of the parallelogram to the nearest degree?
Added by Christopher V.
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Step 1: Calculate angle A using the formula: \( \cos A = \frac{19^2 - 15^2 - 20^2}{-2 \times 15 \times 20} \) Show more…
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