Sure! Let’s solve each of the
four irregular shapes by breaking them into
rectangles, calculating their areas, and adding or subtracting as needed.
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🔹 Shape 1 (Top Left)
This is an L-shaped figure. We can split it into two rectangles:
-
Top rectangle: 2 cm wide × 6 cm tall → Area = 2 × 6 =
12 sq cm
-
Bottom rectangle: 5 cm wide × 1 cm tall → Area = 5 × 1 =
5 sq cm
✔ Total Area = 12 + 5 = 17 sq cm
*(Alternatively, you could draw a big rectangle 5×7 = 35, then subtract the missing part: 3×6=18 → 35–18=17 — same result.)*
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🔹 Shape 2 (Top Right)
Also L-shaped. Split into two rectangles:
-
Left vertical rectangle: 2 cm wide × 7 cm tall → Area = 2 × 7 =
14 sq cm
-
Top horizontal rectangle: 7 cm long × 2 cm tall → Area = 7 × 2 =
14 sq cm
But wait — these overlap at the corner! Actually, better to think of it as:
✔ Option: Subtract from a big rectangle
Big rectangle: 7 cm × (2+2) = 7 × 4 =
28 sq cm
Missing rectangle (the cut-out): 5 cm × 2 cm =
10 sq cm
→ Area = 28 – 10 =
18 sq cm
✔ OR split without overlap:
- Bottom rectangle: 7 cm × 2 cm = 14
- Left vertical strip above it: 2 cm × 2 cm = 4
→ Total = 14 + 4 =
18 sq cm
✔ Answer: 18 sq cm
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🔹 Shape 3 (Bottom Left)
Looks like a square with a smaller rectangle cut out from the middle.
- Big square: 5 in × 5 in =
25 sq in
- Cut-out rectangle: 3 in × 2 in =
6 sq in
✔ Area = 25 – 6 = 19 sq in
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🔹 Shape 4 (Bottom Right)
Step-like shape. Break into two rectangles:
-
Bottom rectangle: 8 in × 2 in =
16 sq in
-
Top rectangle: 6 in × 3 in =
18 sq in
✔ Total Area = 16 + 18 = 34 sq in
*(Note: The top rectangle sits centered on the bottom one — but since we’re only adding areas and there’s no overlap, this works.)*
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✔ Final Answers:
-
Shape 1:
17 sq cm
-
Shape 2:
18 sq cm
-
Shape 3:
19 sq in
-
Shape 4:
34 sq in
Let me know if you’d like a visual breakdown for any of them!
Parent Tip: Review the logic above to help your child master the concept of irregular shapes worksheet.