Rectangle 35
Find the rectangle area when the diagonal is equal to 30 cm and the width is double the length.
Correct answer:

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You need to know the following knowledge to solve this word math problem:
- algebra
- expression of a variable from the formula
- planimetrics
- Pythagorean theorem
- right triangle
- area of a shape
- diagonal
- rectangle
- basic functions
- ratio
Units of physical quantities:
Grade of the word problem:
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