In a quadrilateral, the length of one of its diagonal is 23 cm and the...
Area of quadrilateral
any diagonal × (sum of perpendiculars drawn on diagonal from two vertices)
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In a quadrilateral, the length of one of its diagonal is 23 cm and the...
To find the area of the quadrilateral, we can divide it into two triangles and then calculate the sum of their areas.
1. Divide the quadrilateral:
Draw the perpendiculars from the two vertices on the diagonal. This will divide the quadrilateral into two triangles.
2. Calculate the area of the first triangle:
The first triangle is formed by the diagonal, the perpendicular of length 17 cm, and a side of the quadrilateral. We can use the formula for the area of a triangle, which is 1/2 * base * height.
In this triangle, the base is the diagonal of length 23 cm, and the height is the perpendicular of length 17 cm. Therefore, the area of the first triangle is 1/2 * 23 cm * 17 cm = 195.5 cm^2.
3. Calculate the area of the second triangle:
The second triangle is formed by the diagonal, the perpendicular of length 7 cm, and the other side of the quadrilateral. Using the same formula for the area of a triangle, we can calculate its area.
In this triangle, the base is still the diagonal of length 23 cm, and the height is the perpendicular of length 7 cm. Therefore, the area of the second triangle is 1/2 * 23 cm * 7 cm = 80.5 cm^2.
4. Calculate the total area of the quadrilateral:
To find the total area of the quadrilateral, we need to sum the areas of the two triangles. Adding the area of the first triangle (195.5 cm^2) and the area of the second triangle (80.5 cm^2), we get a total area of 276 cm^2.
Therefore, the correct answer is option C) 276 cm^2.
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