# Exploring Proportions in Triangles

- Author:
- Corazon Bautista

- Topic:
- Triangles

This applet will help you investigate and make conjectures about the relationships among segments formed by parallel lines and angle bisectors in a triangle.
Drag any of the vertices of ∆ABC or point D and observe the measurements shown in columns B and C of the spreadsheet shown on the right.
Formulate a conjecture based on your observation about the segments of the sides formed by a line cutting two sides of a triangle and parallel to the third side.
Drag any of the vertices of ∆FKH and observe the measurements shown in columns B and C again.
Based on your observation, formulate a conjecture about the segments formed by the angle bisector and the sides of the angle bisected.