CBSE Class 8 Mathematics Question 6 of 8

The Baudhayana-Pythagoras Theorem — Question 7

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7
Question
Construct a square whose area is equal to the difference of the areas of squares of side lengths 5 units and 7 units.
Answer

Area of square = 7 2 – 5 2 = 49 – 25 = 24 sq. units 1. Construct a square ABCD with a side of 2 cm. Then DB = 2√2 units 2. Draw BE ⊥ DB at B such that BE = 4 units 3. Join DE. DE 2 = (2√2) 2 + 4 2 = 8 + 16 = 24 ⇒ DE = √24 4. Draw a square with side DE (DEFG). Area of DEFG = (√24) 2 = 24 square units.