Originally Posted by

**releki** **These problems are actually in my Calculus book, we're starting to learn area/volume tomorrow, and I got these problems assigned to me, yet there's not explanation in the book..**

1. a square with sides of length x

2. a square with diagonals of length x

3. a semicircle of radius x

4. a semicircle of diameter x

5. an equilateral triangle with sides of length x

6. an isosceles right triangle with legs of length x

7. an isosceles right triangle with hypotenuse x

8. an isosceles triangle with two sides of length 2x and one side of length x

9. a triangle with sides 3x, 4x, and 5x

10. a regular hexagon with sides of length x

The answers are:

1. x^2

2. x^2/2

3. (pi*x^2)/2

4. (pi*x^2)/8

5. ((√3)/4)*x^2

6. x^2/2

7. x^2/4

8. ((√15)/4)*x^2

9. 6x^2

10. (3((√3)/2))*x^2

Will someone explain how to do these? I only under stand 1/3/4.. the basic ones. thanks

Am I going to have to find formulas for every one of em? I'm pretty unsure about the triangle-shaped ones.