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Can anyone help me find its Area and perimeter? im so confused please also explain it!!

Topic= Measurement Area, volume & capacity​

Can anyone help me find its Area and perimeter? im so confused please also explain-example-1
User Chmoelders
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Answer:

See below

Explanation:

Diameter of the semi circles = 15 - 3-3 = 9mm

radius = 4.5 mm

area of rectangle tha goes through the semicircles = 5 x 15 = 75 mm^2

area of two semicircles =

area of circle with radius 4.5 = pi r^2 = 63.62 mm^2

total area = 75 + 63.62 = `38.62 mm^2

Perimeter Two small side rectangles = 2 * (3+5+3) =26 mm

perimeter of cicle with diameter 9 = pi * d = 9pi = 28.27 mm

total perimeter = 54.27 mm

(check my math !)

User Glw
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