# Right-angled 66364

From a rectangular board with dimensions of 2 m and 3 m, we cut isosceles right-angled triangles at the corners with an overhang of 40 cm. Calculate the ratio of the areas of the rest of the board to its total original area.

### Correct answer:

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Calculation of an isosceles triangle.

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Calculation of an isosceles triangle.

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#### You need to know the following knowledge to solve this word math problem:

**arithmetic**- subtraction
**planimetrics**- right triangle
- area of a shape
- triangle
- rectangle
**basic functions**- ratio
**numbers**- fractions

#### Units of physical quantities:

#### Grade of the word problem:

We encourage you to watch this tutorial video on this math problem: video1

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