Center-Out Shape

For a flat double crochet circle, I start with 12 dc in Rnd 1. How many dc should I have at the end of Rnd 4?

2) Which of the following instructions is correct for a flat circle worked in all single crochet?

3) Which of the following instructions is correct for a flat triangle worked center-out?

I have 12 dc in Rnd 1. On Rnd 2, I want to crochet 4 groups of increases to create a square. How many plain (non-increase) stitches will I have between my increases?

I want to work a flat double crochet square from the center out. How many stitches do I need to start with on Rnd 1 in order to have 4 plain (non-increase) stitches on Rnd 2?

What do you get when you crochet this shape?
Ch 4, join with slip st to form a ring.
Rnd 1: Ch 1 (does not count as a st throughout), 6 sc in ring, join with slip st to first sc—6 sts.
Rnd 2: Ch 3 (counts as dc throughout), dc in same st, 2 dc in each st around—12 sts.
Rnd 3: Ch 1, sc in first st, 2 sc in next st, [sc in next st, 2 sc in next st] around, join—18 sts.
Rnd 4: Ch 3, dc in same st, 2 dc in next st, dc in next st, [2 dc in next 2 sts, dc in next st] around, join with slip st to first sc—30 sts.
Rnd 5: Ch 1, sc in first st, sc in next 3 sts, 2 sc in next st, [sc in next 4 sts, 2 sc in next st] around, join with slip st to first sc—36 sc.

What do you get when you crochet this shape?
Ch 4, join with slip st to form a ring.
Rnd 1: Ch 3 (counts as dc throughout), 11 dc in ring, join with slip st to top of ch-3—12 sts.
Rnd 2: Ch 1 (does not counts as sc throughout), sc in first st, 2 sc in next st, [sc in next st, 2 sc in next st] around, join with slip st to first sc—18 sts.
Rnd 3: Ch 3, dc in same st, 2 dc in next st, dc in next st, [2 dc in next 2 sts, dc in next st] around, join with slip st to top of ch-3 sc—30 sts.
Rnd 4: Ch 1, sc in first 4 sts, 2 sc in next st, [sc in next 4 sts, 2 sc in next st] around, join with slip st to first sc.

How many stitches would I want to have in Round 1 to make a double crochet octagon?

If the gauge is Rnds 1-3 = 4″, about what could I expect the diameter of a flat circle to be at the end of Rnd 5?

Even though I’m following the rules of thumb for increases, my piece is drawing in at the end of Round 3. Which of the following is the problem?