Arêtes
The place where two faces (planes) intersect is called an edge.
the point where the altitudes intersect is called the orthocenter.
Two lines cross or intersect at a point.
A vertex.
Cirques intersect at their highest point, where the walls of adjacent cirques meet to form a sharp ridge or crest called an arête. This intersection often occurs at a mountain peak or ridge line.
TRIANGLESthey are cirques
Cirque: A bowl-shaped depression on the side of a mountain, formed by the erosive activity of a glacier. Cirques are typically characterized by steep walls and may contain a small lake called a tarn at their base.
Cirques
Steep-sided, half-bowl shaped recesses carved into mountains at the heads of glacial valleys. The Fjords: Steep cliffs, acting as ocean inlets. Horn peaks: Where cirques intersect. Terminal moraines: Piles of rocks. Crevasses: Cracks in glaciers
Glaciers grind into mountains by eroding the cirques at their heads. If a mountain has cirques all around it, it is called a horn
Arêtes
True. Glaciers erode the base of mountains into basins called cirques through a process known as glacial erosion. This results in the formation of amphitheater-like depressions at the base of mountains.
Coplanar lines that do not intersect are called parallel lines.
Lines that never intersect are parallel.
Fjords: Steep ocean inlets Drumlins: Smooth hills Cirques: Armchair-shaped valleys Moraines: Piles of rocks :D
Coplanar lines that do not intersect are parallel. Non-coplanar lines that do not intersect are called skew lines.