Answer:
The question mark is just there in place of a number it is telling you that it does not have a number there and you have to solve for it. I hope this helps if not i can explain it more
Step-by-step explanation:
It will be B because Problem A,C,D is wrong not Problem B
Perimeter of the shape = 27.15 units.
Area = 32.3 units²
<h3>How to Find the Perimeter and Area of a Composite Shape?</h3>
The Perimeter of the shape = 1/2(perimeter of circle) + hypotenuse and height of the triangle
Perimeter = = 1/2(2π(5/2)) + [√(9² + 5²)] + 9 = 7.85 + 10.3 + 9 = 27.15 units.
Area = 1/2(area of circle) + area of triangle = 1/2(πr²) + 1/2(bh)
Area = 1/2(π2.5²) + 1/2(5)(9)
Area = 9.8 + 22.5
Area = 32.3 units²
Learn more about perimeter and area on:
brainly.com/question/443376
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B is equal to 1/5. Hope I was able to help
The pythagroean theorem says a² + b² = c² and we're given a and c in this case
12² + b² = 13²
144 + b² = 169; subtract 144 from both sides
b² = 25; square root both sides
b = 5 so the length of side AB is C) 5