PATCHWORK MATH Assembly Techniques By Lynn Wilder What are we - - PowerPoint PPT Presentation

By Lynn Wilder

PATCHWORK MATH Assembly Techniques

What are we going to learn today?

Patchwork Math 2

 Formulas and techniques to create the following:

 Half Square Triangles – 8 at a time  Quarter Square Triangles – 2-color  Quarter Square Triangles – 3 color  Y-Squares  Square in a Square  Tall Triangles  Flying Geese – 8 at a time  Double Flying Geese – 8 at a time  Square in a Triangle – 2 at a time

Half Square Triangles – 8 at a time

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Begin with 2 squares the exact same size Place the lighter square directly on top

• f the darker square

Mark the squares

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Use a ¼” ruler and mark from corner to corner

• n each side of the ruler

Stitch directly on the marked line

Cutting the squares

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Step 1: Cut apart vertically Step 2: Cut apart horizontally Step 3: Cut apart diagonally Step 4: Cut apart diagonally the other way

Pressing

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Press toward the dark triangle

Trimming with a Bloc-Loc ruler

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Align the ruler with the exact size of the UNFINSIHED size that you need and trim the right side. In this case, the unfinished size is 2” Slide the ruler over and trim the left side Before you know it, you have 8 perfect HST’s

A Little Tipsy

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It can take a few “cuts” to get used to a Bloc-Loc

• ruler. I always have my

darker triangle pointing away from me on my cutting board. I make sure the Bloc-Loc letters are upside down. This way I can slide the ruler back and forth and align it with the exact tick marks

• n the ruler.

Two-Color Quarter Square Triangles (Hourglass)

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Begin with two squares. Place right sides together Use a ¼” ruler and mark from corner to corner on each side of the ruler Stitch directly

• n the marked

line

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Cut directly between the stitching lines You will have two sections. Press in the direction of the darker triangle With right sides together, align contrasting triangles, dark half facing the light half Draw a line on both sides

• f the ruler. Stitch

directly on the lines. Cut between the stitching

• lines. Trim the dog ears

You will have two identical hourglass components

Quarter Square Triangles – 3 color

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Begin with four squares Place the matching squares directly on top

• f the dark and light
• squares. Right sides
• together. Mark from

corner to corner on both sides of the line

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Stitch then cut directly between the stitching lines You will have four units that look like this. Press in the direction of the arrows With right sides together, align contrasting triangles (dark half facing the lighter half.)

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Mark from corner to corner on each side of the

• ruler. Stitch directly on the lines

Cut apart between the lines You will have 4 identical components

Y-Squares

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Begin with 4 squares. Note that two of the squares are smaller. Put them aside Place the two larger squares right sides

• together. Mark from corner to corner
• n each side of the ruler

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Cut directly between the lines. Open and press toward the darker triangle Next, slide the smaller, square C under the two HST right sides together Mark, then stitch directly on the lines

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Cut directly between the lines Cut off dog ears. Press in the direction of the larger triangle

Square in a Square

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Begin with one base square and two corner squares If you are working with stripes, cut them from corner to corner like this

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When stitching a triangle to a square, trim the right and left hand corners at a 90° angle It will look like this Trimming the corners will make it much easier to stitch the corners to the base block

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When stitching a triangle to an angle, trim the right and left hand corners at a 45° angle It will look like this Place right sides together and stitch The finished product

Tall Triangle Squares

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Start with 2 squares and 2 rectangles Cut the rectangles like this

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Gently fold the square in half to find the middle of the square Draw a line from the exact mid-point at the top to the corner on each side Cut along this line Stitch the “split” rectangle to the triangle with right sides together. Press toward the split rectangle. Do NOT cut

• ff the

dog ears yet

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Then complete the other side. Press in the direction of the split rectangle Trim ¼” from the apex of top of the square. Trim off the dog ears at the bottom

Flying Geese

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Begin with 1 large square and 4 smaller squares With right side together, place two small squares on top of the large square and mark on both sides of the squares using a ¼” ruler. Stitch directly on the lines. It is good to have the squares overlap

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Cut directly between the lines Press toward the small triangles

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Place the remaining small squares on top of the large squares and mark on both sides of the ruler Stitch directly on the lines, then cut them apart between the lines. Press toward the small triangle

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You will have four components that look like this Trim with a Bloc Loc Flying Geese Ruler

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You will have four, perfect flying geese components that look like this

Double Flying Geese

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Begin with 8 small squares – 4 medium squares – 1 large square

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With right side together, place two small squares on top of the large square and mark on both sides of the squares using a ¼” ruler. Stitch directly on the lines. It is good to have the squares overlap Cut directly between the lines Press toward the small triangles

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Place the remaining small squares on top of the large squares and mark on both sides of the ruler Stitch directly on the lines, then cut them apart between the lines. Press toward the small triangle

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You will have four components that look like this Trim with a Bloc Loc Flying Geese Ruler

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Place a small square RST on the flying

• geese. Mark and stitch directly on the line

Trim ¼” from the stitching line Press toward the triangle

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Place a small square RST on the flying

• geese. Mark and stitch directly on the
• line. Trim ¼” from the stitching line

Press in the direction of the triangle

Corner Square Triangles

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To make 4 Corner Square Triangles begin by cutting: 4 small squares – 4 small rectangles – 2 large rectangles

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Place the small squares on top of the small rectangle, RST and stitch. Press toward the rectangle

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Sew the rectangle/squares together. Do not press the seams yet Clip right at the point of the scissors, clipping through the stitches just a little bit. It’s okay because it will not be visible in the finished block

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Press the seam away from the square and toward the triangle Place this unit directly on top of the larger

• rectangle. Make sure the sides are aligned

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Line your ruler up along the 45 degree line on the ruler. The edge of the ruler should intersect with the seam at the exact corner of the square and the corner of the rectangle. Mark along this line

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The line will look like this Rotate the unit and mark the other side

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Stitch directly on the marked lines

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Cut between the lines, approximately ¼” from the stitching lines. Your cut will NOT be exactly in the middle between the lines Cut one side, turn the component and cut the other side. Trim the dog ears

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Press in the direction of the large triangle