it has 2 lines coming from the top point going down to each of the bottom 2 points the hight of the triangles it makes on the sides is 2 cm with a the height of the triangle it makes in the middle is 5 cm and the length of the bottom of this pentegon is 4 cm please someone help me
2006-06-27 08:00:21 · 5 answers · asked by johnnydeppishot2003 1 in Science & Mathematics ➔ Mathematics
It's in Washington
2006-06-27 08:03:38 · answer #1 · answered by Lone Gunmin 2 · 0⤊ 2⤋
You seem to be confusing your readers in your drawing renditions. I need 2 answers from you:
1. Is it a regular pentagon (all sides are =)? If so, to find the area of it, use this formula:
A = 1/2 * m * p
Where A is the area of the pentagon, m is the apothem (defined below) and p is the perimeter of the pentagon, easily calculated by you.
Apothem: a line segment that goes from the center of the polygon to the midpoint of one of the sides, forming a right angle.
2. If it is not, split the pentagon into shapes that you can find the area of, and add them all together. Some shapes you can use:
Triangle - Area = 1/2 * base of triangle * height (NOT THE LENGTH)
Rectangle - Base * Height
Square - Base * Height
Using any other shape would just make things complicated. Find the area of the little shapes, and add together to find the area of the pentagon.
2006-06-27 18:01:51 · answer #2 · answered by Anonymous · 1⤊ 0⤋
turn the pentagon to triangles then find the area of a triangle then multiply the answer by the number of tringles! Simple.
2006-06-27 15:10:57 · answer #3 · answered by Ultimate Chopin Fan 4 · 0⤊ 0⤋
base length times heigth on central point/2 times 5 if the pentagon is regular
2006-06-27 15:03:20 · answer #4 · answered by pogonoforo 6 · 0⤊ 0⤋
if you know the length of the bottom of the pentagon (assuming it's a regular pentagon), the area is 1.720s²
2006-06-27 15:05:55 · answer #5 · answered by bequalming 5 · 0⤊ 0⤋