radius = 17/(2*pi) = 2.705634033 or 2.706 cm to 3 d.p.
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53.41 cm
Area of circle = pi x (radius)2 pi= 3.1416 radius = diameter/2 = 17/2=8.5cm Therefore, Area= 3.1416 x (8.5)2 Area= 226.98 sq.cm.
1m 17cm > 109cm--1m 17cm = 117cm117cm > 109cm
They are a measurement of distance
If the sides are 10cm, 17cm and 21cm, the three angles are approx 28, 53 and 99 degrees. It is an obtuse angled triangle.