Question

Find the perimeter and tell what is this shape

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Answer 1

there is a half circle with a diameter of 20cm

P = (2*pi*r)/2 =(2*pi*10)=62.8/2=31.4cm

the triangle is assumed to be right-angled

pythagoras' theorem

hypotenuse² = 30²+40²

hypotenuse = V2500=50cm

Perimeter figure :

30+50+40+30+31.4=181.4cm

Explanation: