To solve the problem, we need to determine whether the dotted line drawn on each figure is a
line of symmetry. A line of symmetry divides a shape into two identical halves that are mirror images of each other. Let's analyze each figure step by step:
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1)
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Shape: Triangle
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Dotted Line: Horizontal line through the middle
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Analysis: The triangle is not symmetrical along the horizontal line because the left and right sides do not match when folded along this line.
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Answer:
No
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2)
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Shape: Rectangle
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Dotted Line: Vertical line through the center
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Analysis: The rectangle is symmetrical along the vertical line because both sides are identical when folded along this line.
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Answer:
Yes
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3)
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Shape: Trapezoid
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Dotted Line: Horizontal line through the middle
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Analysis: The trapezoid is not symmetrical along the horizontal line because the top and bottom edges are different lengths, and the sides do not match when folded along this line.
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Answer:
No
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4)
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Shape: Triangle
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Dotted Line: Vertical line through the apex
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Analysis: The triangle is symmetrical along the vertical line because both sides are identical when folded along this line.
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Answer:
Yes
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5)
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Shape: Heart
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Dotted Line: Vertical line through the center
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Analysis: The heart is symmetrical along the vertical line because both sides are identical when folded along this line.
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Answer:
Yes
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6)
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Shape: Rectangle
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Dotted Line: Horizontal line through the center
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Analysis: The rectangle is symmetrical along the horizontal line because both sides are identical when folded along this line.
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Answer:
Yes
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7)
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Shape: Parallelogram
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Dotted Line: Horizontal line through the middle
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Analysis: The parallelogram is not symmetrical along the horizontal line because the left and right sides do not match when folded along this line.
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Answer:
No
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8)
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Shape: Arrow
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Dotted Line: Vertical line through the center
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Analysis: The arrow is symmetrical along the vertical line because both sides are identical when folded along this line.
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Answer:
Yes
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9)
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Shape: Trapezoid
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Dotted Line: Horizontal line through the middle
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Analysis: The trapezoid is not symmetrical along the horizontal line because the top and bottom edges are different lengths, and the sides do not match when folded along this line.
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Answer:
No
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10)
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Shape: Zigzag
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Dotted Line: Horizontal line through the middle
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Analysis: The zigzag is not symmetrical along the horizontal line because the pattern does not match when folded along this line.
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Answer:
No
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Final Answers:
1. No
2. Yes
3. No
4. Yes
5. Yes
6. Yes
7. No
8. Yes
9. No
10. No
Boxed Answer:
\[
\boxed{\text{No, Yes, No, Yes, Yes, Yes, No, Yes, No, No}}
\]
Parent Tip: Review the logic above to help your child master the concept of printable symmetrical shapes.
