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1. **Question (d):** To find the next pattern in the sequence, observe how each new shape in the pattern has one more triangular figure added. The shapes grow by adding an extra triangular unit on the right side of the previous shape. So, the next pattern will have five triangular units in a row, following the same arrangement style.

2. **Question (e):** To determine the number rule, analyze how each shape grows by counting the triangles in each stage:
   - 1st shape: 3 triangles
   - 2nd shape: 6 triangles
   - 3rd shape: 9 triangles

   This indicates a linear growth with the number of triangles increasing by 3 each time. Therefore, the rule can be expressed as:
   \[
3 \times n - 0 = x
\]
where \( n \) is the stage number, and \( x \) is the total number of triangles.

Study the pattern below then answer the question:

(d) Draw the next pattern that should follow.
(e) Complete the number sentence below to show the rule for the pattern.

Learn how to identify the next shape in a growing pattern and how to write a rule for the sequence. This problem involves recognizing patterns, completing sequences, and understanding arithmetic progressions, suitable for Grade 5-6 students.

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