SAT Prep - Math

Truth be told. Problems involving Arcs and Sector are somewhat rare on the SAT. However if you are familiar with circles, solving Arcs and Sector problems is relatively easy. Lets start with understanding what these shapes are: Arc An arc is a part o... read more ››

The area of a circle is the number of square units enclosed within the circle. You can use the following formula to calculate the area of a circle: Where is the area of the circle and is the radius of the circle. The symbol is a constant. To keep... read more ››

The distance around a circle is commonly referred to as the perimeter or circumference of the circle. Consider circumference as the length of the line that forms a circle. The circumference of a circle can be calculated using the following formula: ... read more ››

Problems on circle and its properties are commonly asked in SAT. First, you should be familiar with certain circle "vocabulary" that is commonly used in SAT questions. Radius and Center A circle is a closed curve consisting of those points ... read more ››

The tangent to a circle is a line that touches the circle at exactly one point. That point is known as the point of contact. The radius of the circle which joins the center of the circle to the point of contact (the tangent) is perpendicular to the... read more ››