9.2 cm
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The perimeter is 150 cm. The formula is twice the sum of (width plus length). P = 2(w+l) = 2(30+45)= 2(75)=150150 cm
203.09 + 182.88 = 385.97. Divided by 2 = 192.985cm
19 cm
205cm
The perimeter of a quarter circle is 2 radii plus a quarter of the circumference of the whole circle: → 2 × radius + ¼ × 2 × π × radius = 32.13 cm → radius × (2 + π/2) = 32.13 cm → radius = 32.13 ÷ (2 + π/2) cm ≈ 9.00 cm