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# How do you find the perimeter of similar polygons?

## How do you find the perimeter of similar polygons?

In summary, polygons are similar when they have the exact same shape and their interior angles are the same and their sides are proportional. Perimeter is the one-dimensional measurement of the distance around a shape. You can find the perimeter of any polygon by adding the length of all the sides.

How do you find the area of similar figures?

If two polygons are similar, the ratio of their areas is equal to the square of the ratio of their corresponding sides. (Note that area is not a “length” measurement – it is a surface “area” measurement.)

What is the areas of similar polygons Theorem?

Theorem 8.2 ‐ Areas of Similar Polygons If two polygons are similar, then the ratio of their areas is equal to the squares of the ratios of their corresponding side lengths.

### How do you find the area of a polygon?

To find the area of a regular polygon, all you have to do is follow this simple formula: area = 1/2 x perimeter x apothem. Here is what it means: Perimeter = the sum of the lengths of all the sides….Plug the apothem and the perimeter into the formula.

1. area = 1/2 x 120 x 10√3.
2. area = 60 x 10√3.
3. area = 600√3.

How do you find out the area of a polygon?

How do you work out the perimeter of similar shapes?

Perimeters of Similar Figures of their perimeters is equal to the ratio of their corresponding side lengths.

## How are perimeters of similar figures related?

How do you find the area of two polygons?

The formula to calculate the area of a regular polygon is, Area = (number of sides × length of one side × apothem)/2, where the value of apothem can be calculated using the formula, Apothem = [(length of one side)/{2 ×(tan(180/number of sides))}].

What is AAA similarity theorem?

Euclidean geometry may be reformulated as the AAA (angle-angle-angle) similarity theorem: two triangles have their corresponding angles equal if and only if their corresponding sides are proportional.

### What is polygon formula?

Polygon Formula The sum of interior angles of a polygon with “n” sides =180°(n-2) Number of diagonals of a “n-sided” polygon = [n(n-3)]/2. The measure of interior angles of a regular n-sided polygon = [(n-2)180°]/n. The measure of exterior angles of a regular n-sided polygon = 360°/n.

How do you find the perimeter and area of a polygon?

If the perimeter of a polygon is given, then its area can be calculated using the formula: Area = (Perimeter × apothem)/2. In this formula, the apothem should also be known or it can be calculated with the help of the formula, Apothem = [(length of one side)/{2 ×(tan(180/number of sides))}].

What is area formula?

Given a rectangle with length l and width w, the formula for the area is: A = lw (rectangle). That is, the area of the rectangle is the length multiplied by the width. As a special case, as l = w in the case of a square, the area of a square with side length s is given by the formula: A = s2 (square).

## How do you find similar polygons?

Two polygons are similar if their corresponding angles are congruent and the corresponding sides have a constant ratio (in other words, if they are proportional). Typically, problems with similar polygons ask for missing sides. To solve for a missing length, find two corresponding sides whose lengths are known.

What is the AAA formula?

AA (or AAA) or Angle-Angle Similarity If any two angles of a triangle are equal to any two angles of another triangle, then the two triangles are similar to each other. From the figure given above, if ∠ A = ∠X and ∠C = ∠Z then ΔABC ~ΔXYZ.

What is SSA theorem?

SSA congruence rule states that if two sides and an angle not included between them are respectively equal to two sides and an angle of the other then the two triangles are equal.