A square of side 10 cm has a triangle removed from it. The base of the removed triangle is 6 cm and its height is 4 cm. What is the area of the remaining figure?
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Worked Solution
Area of the square = side × side = 10 cm × 10 cm = 100 cm².
Area of the removed triangle = 1/2 × base × height = 1/2 × 6 cm × 4 cm = 12 cm².
Area of the remaining figure = Area of square - Area of triangle
Area = 100 cm² - 12 cm² = 88 cm².
Key formula: Area of square = side × side; Area of triangle = 1/2 × base × height
Answer: 88 cm²
Correct answer: 88 cm²
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