Hello friends,

these are mathematical problems proposals to perform with App Inventor **BLOCKS**.

Please do not publish the answers in this discussion, since they are proposals for users who want to try or teachers who want to propose to their students.

**1.- Given ordered coordinates of a polygon with n vertices, find area of the polygon.**

The coordinates are given either in clockwise or anticlockwise.

Example:

coordinates (x1,y1,x2,y2,x3,y3,...) = 4,10,9,7,11,2,2,2

area = 45.5

Information:

https://www.mathopenref.com/coordpolygonarea.html

Solution with extension:

p150_extension_area.aia (11.2 KB)

**1B.- Given ordered coordinates of a polygon with n vertices, find perimeter of the polygon.**

The coordinates are given either in clockwise or anticlockwise.

https://www.mathsisfun.com/algebra/distance-2-points.html

**1C.- Calculate the sum of the length of these segments.**

Coordinates: x1,y1,x2,y2,x3,y3,...

Coordinates: 0,0,0,5,1,5,2,5,3,2,4,5,5,5,5,-5,6,-5,7,-4,8,-5,9,-5,10,-5,10,0

Sol: 35.15298

Unfinished: p150_longitud_i.aia (38.2 KB)