Question

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Answer 1

First find the last side of the triangle:
c^2 = a^2+b^2
c = sqrt(12^2+16^2)
c = sqrt(400)
c = 20

So now we have 3 circles with radii of 16, 12 and 10 cm.
We need half of the circumference of each of these circles so use the rule:
C = 2Pi*r
and now divide by 2 because we need half:
0.5C = Pi*r

Since we need to add them all together at the end, I would factorise all of the radii together to make it simpler:
0.5C = Pi * (16+12+10)
0.5C = Pi * 38
0.5C = 119.38

Therefore the perimeter of the shape is approximately 119.38cm.

Answer 2

omg. thank you sooooo much! <333 :)