randRange(1, 8)

Suppose the radius of a circle is \color{R_COLOR}{R}. What is its diameter?

2 * R
initCircle(R),drawRadius(R)

We know d = 2r, so d = 2 \cdot \color{R_COLOR}{R} = \color{D_COLOR}{2 * R}.

drawDiameter(R)
randRange(1, 8)

Suppose the diameter of a circle is \color{D_COLOR}{2 * R}. What is its radius?

R
initCircle(R),drawDiameter(R)

Sabemos que d = 2r, así que r = d / 2 y r = \color{D_COLOR}{2 * R} / 2 = \color{R_COLOR}{R}.

drawRadius(R)
randRange(1, 8)

Suppose the radius of a circle is \color{R_COLOR}{R}. What is its circumference?

Math.PI * 2 * R
initCircle(R),drawRadius(R)

We know c = 2\pi r, so c = 2 \pi \cdot \color{R_COLOR}{R} = \color{C_COLOR}{2 * R\pi}.

drawCircumference(R)
randRange(1, 8)

Suppose the circumference of a circle is \color{C_COLOR}{2 * R\pi}. What is its radius?

R
initCircle(R),drawCircumference(R)

We know c = 2\pi r, so r = c / 2\pi = \color{C_COLOR}{2 * R\pi} / 2 \pi = \color{R_COLOR}{R}.

drawRadius(R)
randRange(2, 16) / 2

Suponiendo que el diámetro de un círculo es \color{D_COLOR}{2 * R}. ¿Cuál es su perímetro?

Math.PI * 2 * R
initCircle(R),drawDiameter(R)

Sabemos que c = \pi d, entonces c = \pi \cdot \color{D_COLOR}{2 * R} = \color{C_COLOR}{2 * R\pi}.

drawCircumference(R)
randRange(2, 16) / 2

Suponiendo que el perímetro de un círculo es \color{C_COLOR}{2 * R\pi}. ¿Cuál es su diámetro?

2 * R
initCircle(R),drawCircumference(R)

We know c = \pi d, so d = c / \pi = \color{C_COLOR}{2 * R\pi} / \pi = \color{D_COLOR}{2 * R}.

drawDiameter(R)