An almost-full flask or beaker with a triangular point to empty its contents, a stirring rod and measuring lines on it.

Flask With Stirring Rod

A tree with triangular leafage next to grass or an uneven small bush.

Tree And Bush

A geometric toy castle with a small triangular flag on the tallest tower.

A ceiling lamp with a curved lampshade, hanging from a wire.

A triangular ruler for geometry with measuring lines on one side.

A ceiling lamp with a large curved lampshade, hanging from a wire.

A ceiling lamp with a triangular lampshade, hanging from a thick straight wire.

A triangular based beaker with a narrow rim and bubbles.

A busy and overworked manager or employee surrounded by charts, graphs, and notifications.