15. In the given figure, ABCD is a square of side 4 cm. E and Fare mid-points of AB and AD
respectively. Find the area of the shaded region.
F
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*Question:—
In the given figure, ABCD is a square of side 4 cm. E and Fare mid-points of AB and AD respectively. Find the area of the shaded region F.
*Answer:—
- The area of the Shaded region is 12cm².
Step by Step Explanation:—
Consider the square ABCD =>
→ Side= 4cm
→ area of square = a²
→ area of square = 4²
→ area of square = 16cm²
Given that:—
F and E are the midpoints of AB and AD
AB = AD (sides of a square)
Therefore,
→ 1/2 of AB = 1/2 of AD
→ AF = AE=2cm ______(sides AB = AD = 4cm)
Consider the triangle AFE =>
→ FE² = AF² + AE² (pythagoras theorem)
→ FE² = 2² + 2²
→ FE² = 4 + 4
→ FE² = 16
→ FE = √16
→ FE = √4 × 4
→ FE = 4 cm²
Therefore,
→ FE = √16 = 4cm²
Area of shaded portion = Area of square - Area of triangle:—
- = 16cm² - 4cm²
- =12cm²
Hence,
The area of the Shaded region is 12cm².
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