Middle school geometry

Answer all the questions below and press submit to see how many you got right.

id: 7308

Which formula describes the circumference $C$ of a circle with diameter $d?$

  • $C=4\pi(\frac{d}{2})^2$
    $C=\pi(\frac{d}{2})^2$
    $C=\frac{4}{3}\pi(\frac{d}{2})^3$
    $C=\pi d$
id: 7404

What is the area in square cm of a parallelogram that has a base of 5 cm and a height of 5 cm?

id: 7908
Card image cap

Which statements are true about the angles $\alpha$ and $\beta$ at the crossings of the line EF with the parallel lines AB and CD in the picture above?

  • $\alpha$ and $\beta$ are alternate interior angles.
    $\alpha=\beta$
    $\alpha$ and $\beta$ are alternate exterior angles.
    $\alpha+\beta=180^{\circ}$