3 years ago

What is the area of the yellow region?

2 answers:

7 0

The area of the yellow region is the area of square minus 4 times the area of one half semicircle at the corner of the square. These four half semicircle will form a complete circle. This means that the area of 4 half semicircles is equal to the area of the circle.

spayn [35]3 years ago

6 0

Answer:

195 sq cm

Step-by-step explanation:

15 x 15 = 225

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3(8) + 2(3) = 30

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225 - 30 = 195 sq cm

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If the total area of a picture measuring 10 inches by 12 inches plus a matting of uniform width surrounding the picture is 224 s

ELEN [110]

Let
x-----------> <span>uniform width surrounding the picture

we know that
(10+2x)*(12+2x)=224-----> 120+20x+24x+4x</span>²=224
4x²+44x+120-224=0
4x²+44x-104=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is
x=2 in

the answer is
2 inches