The small, Google Home-looking device professes to ward off mosquitos within a 20-foot radius. We’ve been impressed with Thermacell products in the past, and found the Thermacell LIV Smart Mosquito ...

Enter Thermacell’s LIV, an installed mosquito ... When setting up the Repellers, it soon becomes clear how small a 10-foot radius is—I had to get strategic about placement.

The magic of this screen curtain won't work as well if you have a metal door. Promising review: "Ophelia, my cat, and I both ...

The biggest stories of the day delivered to your inbox.

To find the equation of a circle when you know the radius and centre, use the formula \({(x - a)^2} + {(y - b)^2} = {r^2}\), where \((a,b)\) represents the centre of the circle, and \(r\) is the ...

All circles have a circumference, diameter and radius. They can be measured using a ruler or tape measure. The circumference is the distance all the way around a circle. The diameter is the ...