Take the number you are given, double the difference between your number and 5, add four, divide by 2. If the first number is 12
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Shaded area = Area of circle - 2(area of one triangle)
The circle has radius 5 cm, so its area is
The triangle has a base of 6 cm. Two of its legs coincide with the radius of the circle, which means the height of the triangle must be 5 - 1 = 4 cm. So one triangle's area would be
.
Shaded area =
.
The circle has radius 5 cm, so its area is
The triangle has a base of 6 cm. Two of its legs coincide with the radius of the circle, which means the height of the triangle must be 5 - 1 = 4 cm. So one triangle's area would be
Shaded area =