Area of Rectangles and Squares.
Please show the work, I need help

Here, I think I can help you out:
1. 21 ÷ 3
= 7
Therefore, the length is 7cm².
2. 35 ÷ 7
= 5cm²
- And so on. Simply divide the area by the length of the side given; you can answer up to question six using this strategy.
7. All sides of a square are the same length.
7 x 7
= 49cm²
9. 2 x 3.5
= 7m²
- The formula to find the area of a square/rectangle is length x width. Just multiply the given lengths for the answers :)
Step-by-step explanation:
Q.1 Solutions
1. Area of rectangle= L×B
21=L×3
21/3=L
7cm Answer
2. Area of square=S×S
35m²=S×7m
35/7=S
5=S
5m Answer
3. Area of rectangle= L×B
5%m²=L×½m
5/½=L
2.5=L
2.5m Answer
4. Area of square= S×S
120mm²=S×10mm
120/10=S
12=S
12mm Answer
5. Area of rectangle= L×B
7%m²=L×1%m
7/1=L
7=L
7m Answer
6. Area of square=S×S
15cm²=S×6cm
15/6=S
2.5=S
2.5cm Answer...
Q.2 Solutions
Note: you might be knowing the formulas so please understand this:
7.49cm
8.400cm
10.86cm
11.40m
12.244m
13.1600m
14.120cm
15.134m
hope it helps!!!!! :) :)