Google Classroom
GeoGebraGeoGebra Classroom

Copy a Triangle

1) Start by copying segment BC onto the dotted line at point D. 2) Copy angles B and C onto the endpoints of the segment you just created. 3) Use the Intersect toolToolbar Image to mark where those two rays intersect. This point is the third vertex of the copied triangle. 4) To create the actual triangle, use the Polygon toolToolbar Image. Click the vertices of your new triangle in order going around the triangle, then finally click the one you started with to complete the polygon (for example, if you started with point D, then point D also needs to be the last point you click). 5) Use the Distance toolToolbar Image and the Angle Measure toolToolbar Image to verify that all sides and angles of the new triangle are congruent to those of the original.