# How do you find area with vertices?

## How do you find area with vertices?

To find the area of a triangle where you know the x and y coordinates of the three vertices, you’ll need to use the coordinate geometry formula: area = the absolute value of Ax(By – Cy) + Bx(Cy – Ay) + Cx(Ay – By) divided by 2. Ax and Ay are the x and y coordinates for the vertex of A.

How do you find the area and perimeter of a triangle with vertices?

Perimeter= 3 + 5 + 4 = 12 To find the perimeter of the triangle, find the lengths of each side of the triangle using the distance formula. Use the distance formula to find the length between point A and B, B and C, C and A. Then add all three lengths together to get the perimeter.

What is the formula for finding the perimeter?

The perimeter is the sum of all sides of a figure to get one length. So, to find the perimeter, the formula is base + height + base + height. If the base is 10 inches and the height is 5 inches, you would have: Perimeter: 10 + 5 + 10 + 5 = 30 inches.

### How do you calculate perimeter on a graph?

Finding the Perimeter of Shapes on Graphs. To find the perimeter using Geogebra, click on the angle icon and look for distance or length and click on it. After that click on the sides to find the length of each side. Then, just add the numbers the find the perimeter.

How do you find the perimeter of a polygon?

How to find the perimeter of a polygon. The perimeter of any polygon is the total distance around the outside, which can be found by adding together the length of each side. For example, a quadrilateral whose sides are 12,6,9 and 8, the perimeter is the sum of these, or: Perimeter = 12+6+9+8 = 35.

How do you find the perimeter of a triangle?

Remember the formula for finding the perimeter of a triangle. For a triangle with sides a, b and c, the perimeter P is defined as: P = a + b + c. What this formula means in simpler terms is that to find the perimeter of a triangle, you just add together the lengths of each of its 3 sides.