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6.2 The Pythagorean Theorem - Big Ideas Learning

Section 6.2 The Pythagorean Theorem 239 EXAMPLE 2 Finding the Length of a Leg Find the missing length of the triangle. a 2 + b 2 = c 2 Write the Pythagorean Theorem. a 2 + 2.12 = 2.9 2 Substitute 2.1 for b and 2.9 for c. a 2 + 4.41 = 8.41 Evaluate powers. a 2 = 4 Subtract 4.41 from each side. a = 2 Take positive square root of each side. The length of the leg is 2 centimeters.