## 1.5 Using Formulas in Geometry

Perimeter: Sum of the side lengths of a figure

Area: Number of non-overlapping square units of a given size that exactly cover a figure

Diameter: Segment that passes through the center of the circle, and whose endpoints are on the circle

Radius: Segment whose endpoints are the center of the circle and a point on the circle

Circumfrance: Distance around the circle

Pi: The Ratio of a circle’s circumfrance to its diameter, it is rational and can be approximated as 3.14 or 22/7

Rectangle Equations

P= 2(Length)+2(Width)

A= L*W

Square Equations

P= 4s (4* sides)

A= s^2 (Sides squared)

Triangle Equations

P=a+b+c (sides a, b, and c)

A= ½bh (base*height)

Area: Number of non-overlapping square units of a given size that exactly cover a figure

Diameter: Segment that passes through the center of the circle, and whose endpoints are on the circle

Radius: Segment whose endpoints are the center of the circle and a point on the circle

Circumfrance: Distance around the circle

Pi: The Ratio of a circle’s circumfrance to its diameter, it is rational and can be approximated as 3.14 or 22/7

Rectangle Equations

P= 2(Length)+2(Width)

A= L*W

Square Equations

P= 4s (4* sides)

A= s^2 (Sides squared)

Triangle Equations

P=a+b+c (sides a, b, and c)

A= ½bh (base*height)