Area and Perimeter of trapezium

Explanation

To find the area and perimeter of a trapezium, we will follow a systematic approach. Here’s how to solve the problem step by step.

### Given:
- Height (h) = 19 cm
- Area of the trapezium = 475 cm²
- Difference between the lengths of the parallel sides (A - B) = 4 cm

### Step 1: Use the Area Formula
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