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ReneOh, dude, it's like you're throwing me back to math class! So, if you have 4 squares, each with sides of 1cm, you just gotta calculate each square's area (1cm x 1cm = 1cm²) and then add them up (4 squares x 1cm² = 4cm²). Boom, there you have it, the total area of those squares is 4 square centimeters.
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How do you Move 4 toothpicks from 4 squares to make 3 squares?
move
Ho do you prove the formula for the area of a rectangle?
Use squares and try it out for yourself. Get a number of squares and make a rectangle 3 squares long by 4 squares wide. Count the squares. You should have 12 squares (or 3*4). That's the best way I know to prove the formula.
How many squares are there in a 4 by 3 grid?
In a 4 by 3 grid, there are a total of 20 squares. To calculate this, you can start by counting the individual squares of each size within the grid. There are 12 one-by-one squares, 6 two-by-two squares, and 2 three-by-three squares. Adding these together gives a total of 20 squares in a 4 by 3 grid.
How many 3cm squares and 2cm squares do you need to get a total area 35sq cm?
You would need two 3 cm squares and two 2 cm squares to get a total area of 35 sq cm. A 3 cm square has an area of 9 sq cm and a 2 cm square has an area of 4 sq cm.
Why does a lens with with 2 cm diameter have 4 times the light gathering power of a 1 cm lens?
Because the 2cm lens has 4 times the area of a 1cm lens. (area = Pi*r2)
