Basic triangle: Crochet Triangle Motif Generator

Begin with a row-grown wedge

This basic triangle reference is a flat wedge worked back and forth. It starts with three double crochets in one foundation chain and adds three posts per row. It is deliberately different from a triangle that grows outward around three corner spaces. Five rows end with fifteen posts. The task is to follow unequal edge increases while the reading direction reverses, without assuming that a triangular-looking outline proves equal side lengths or a measured equilateral shape.

Prepare simple edge markers

Use smooth DK cotton and begin with a four-millimeter trial hook. Blue #243BCE occupies both palette slots, keeping the wedge one color. Have scissors, a tapestry needle, a ruler and two removable markers ready. Select Flat wedge: alternating rows, five rows and US terms. Leave the final edge set to No extra finish; the center-out corner-space finish does not apply to this row construction. Put markers in actual edge posts rather than in the uncounted height chains.

Make three posts in one base

Chain four and work three double crochets in the fourth chain from the hook. The three chains used for starting height do not count as another post. Count three completed double crochets in the shared base. Mark the first and last actual posts. These marks identify the two distinct insertion sources needed on the next row. Do not count the loose starting tail as a chain or add a fourth post to make the foundation resemble another familiar pattern.

Exact downloadable construction

Download this case JSON into the Triangle Motif Generator.

1. Ch 4; work 3 dc in fourth chain from hook. The starting ch-3 does not count. Completed stitches or units: 3.
2. Ch 2, turn (does not count). 2 dc in first stitch, dc in each of the 1 middle stitches, 3 dc in last stitch. Completed stitches or units: 6.
3. Ch 2, turn (does not count). 2 dc in first stitch, dc in each of the 4 middle stitches, 3 dc in last stitch. Completed stitches or units: 9.
4. Ch 2, turn (does not count). 2 dc in first stitch, dc in each of the 7 middle stitches, 3 dc in last stitch. Completed stitches or units: 12.
5. Ch 2, turn (does not count). 2 dc in first stitch, dc in each of the 10 middle stitches, 3 dc in last stitch. Completed stitches or units: 15.

Distinguish the two edge increases

Chain two for height and turn. Work two double crochets in the first actual stitch, one in each middle stitch and three in the last actual stitch. On the first transition there is one middle post, so two plus one plus three gives six. The old three posts are consumed once each as insertion sources. Producing two at the first source adds one, and producing three at the last source adds two. Together they add three completed posts.

Keep following the turned direction

Repeat the same rule for three more rows. The counts become nine, twelve and fifteen. The physical edge that was last on the previous row becomes first after turning; the pattern's words first and last refer to the current working direction. Follow the alternating source map instead of permanently assigning the larger increase to one named side of the screen. Height chains remain uncounted, and an extra stitch worked into them would change the next row's source budget.

Audit the full row sequence

The five counts sum to forty-five double crochets. Row two has one middle post, row three has four, row four has seven and row five has ten. In every transition, the middle quantity is the previous row count minus two. This gives independent checkpoints beyond the final total. A missed middle stitch and an extra edge stitch can cancel in the arithmetic while changing the shape, so inspect the actual first, last and middle sources before fastening off.

Questions before using the wedge

Can this record be joined automatically to center-out triangles? Their edge constructions and measured lengths must be checked separately. Is the wedge reversible? Both faces exist, but equal visual texture and physical drape require an actual sample rather than a chart label. Weave the ends, care for the trial and measure its relaxed outline. If the edge develops a gap, check whether a height chain was counted as a base. Read the troubleshooting guide before forcing the outline flat; no physical shape or size certification is claimed here.