What is the approximate area of the shaded region? Use 3.14 for π.


A.
29 square inches
B.
26.86 square inches
C.
28.43 square inches
D.
33.14 square inches

What is the approximate area of the shaded region Use 314 for π A 29 square inches B 2686 square inches C 2843 square inches D 3314 square inches class=

Respuesta :


* You have a shape made of a half-circle stuck to a rectangle.
* The total area of this shape is 3.14 square inches.
* You need to figure out what size everything is.
Steps:
* Areas:
* A half-circle's area is half the normal circle's area: (1/2) * pi * radius * radius
* A rectangle's area is length * width
* Let's Use 'r' for Radius:
* The circle's diameter (line across the middle) is the same as the rectangle's width. Let's call this width 'r'.
* The rectangle's height is 5 times the width (5 * r)
* Equation Time:
* Total Area = (Half-circle Area) + (Rectangle Area)
* 3.14 = (1/2) * 3.14 * r * r + (r * 5r)
* Solve for 'r':
* The equation gets a bit tricky, but the answer is r = 1 inch
* Find the Areas:
* Rectangle Area = width * height = 1 * 5 = 5 square inches
* Half-circle Area = (1/2) * 3.14 * 1 * 1 = about 1.57 square inches
* Final Answer:
* Total Area = 5 + 1.57 = 6.57 square inches (approximately)
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