# Perimeter of Triangle/Parallelogram

- Author:
- m.doerr0792

- Topic:
- Parallelogram, Perimeter

To find the side length of a shape with a sloped line, the Pythagorean theorem is used. The Pythagorean theorem formula is a^2+b^2=c^2.
Side AB=5
To find side AC of the triangle, the Pythagorean theorem is used using DA and DC.
3^2+3^2=c^2
18=c^2
square root of 18= AC
To find side CB of the triangle, the Pythagorean theorem is used using CE and EB.
2^2+3^2=c^2
13=c^2
square root of 13= CB
Perimeter= 5+ square root 18+ square root 13= about 12.8 units