Math problem: The circumference of a half circle is 17.99 cm. What is its diameter? Search process
The circumference of a semicircle is the circumference of a semicircle plus its diameter. The circumference of a circle is π times the diameter, so the circumference of a semicircle is π/2 times the diameter. The circumference of this semicircle is (1+π/2) times the diameter, and the diameter is17.99 ÷ (1+3.14/2).