Question

СРОЧНО!!! СРОЧНО! Площадь пятиугольника со стороной 5 см. Желательно с пояснением. Плиз!

Answer 1

У пятиугольника, пять углов, а значит 5 сторон
5 * 5 = 25 см.

Answer 2

Calculating the Area of a Pentagon with a Side Length of 5 cm

To calculate the area of a regular pentagon with a side length of 5 cm, we can use the following formula:

Area = (5/4) * (5/tan(π/5)) * 5^2

Let's break this down step by step:

1. Calculate the Apothem (a): - The apothem of a regular pentagon can be calculated using the formula: a = s / (2 * tan(π/5)), where s is the side length. - Substituting the given side length, we get: a = 5 / (2 * tan(π/5)).

2. Calculate the Area: - The area of a regular pentagon can be calculated using the formula: Area = (5/4) * (a * s), where a is the apothem and s is the side length. - Substituting the calculated apothem and given side length, we get: Area = (5/4) * (5 / (2 * tan(π/5))) * 5.

Calculation

- Area = (5/4) * (5 / (2 * tan(π/5))) * 5 - Area ≈ 59.4419 cm²

So, the area of a regular pentagon with a side length of 5 cm is approximately 59.4419 square centimeters.