5-1 Understanding Perimeter and Area

Perimeter of a Polygon: add up all the sides and lengths.

Distance formula: The square root of (x2-x1)squared+(y2-y1)squared.

Thm 5-1 Area of a rectangle

A= Base times Height of A=Length times Width.

Postulate 5-1 Area of a Square

A=Side Squared

Postulate 5-2; If 2 figures are congruent, then their areas are the same.

Postulate 5-3: Area of a regionis the sum of its areas non-overlapping parts.

Problem 1-1

Find the Area of the square if all sides are congruent, and they all = 4.5 meters.

18 a>

12 a>

62

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