# Octagon from rectangle

From tablecloth rectangular shape with dimensions of 4 dm and 8 dm we cuts down the corners in the shape of isosceles triangles. It thus formed an octagon with area 26 dm2. How many dm2 we cuts down?

Result

x =  6 dm2

#### Solution:

$x=8 \cdot \ 4-26=6 \ \text{dm}^2$

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

Tips to related online calculators

## Next similar math problems:

1. A rectangle
A rectangle has an area of 36 cm2. What could the length and width of rectangle be?
2. 7 triangle
The triangle area is 26.7 cm2. Determine the side length l if appropriate height hl = 45.3 cm.
3. Bathroom 2
A bathroom is 2.4 meters long and 1.8 meters wide. How many square tiles 1 dm on each side are to be used to cover it?
4. Circle area
Calculate the circle area with a radius of 1.2 m.
5. 22/7 circle
Calculate approximately area of a circle with radius 20 cm. When calculating π use 22/7.
6. Area of a triangle
What is the area of a triangle that has the base 4 1/4 and the height of 3 3/3?
7. Area of RT 2
Calculate the area of right triangle whose legs have a length 5.8 cm and 5.8 cm.
The size of two internal angles of a triangle ABC are α=6/18π and β=7/18π. Calculate the size of the third angle.
9. Angles in triangle
Calculate the alpha angle in the triangle if beta is 61 degrees and 98 gamma degrees.
10. Melting point
The melting point of mercury is -36°F and its boiling point is 672°F. What is the difference between the boiling point and the melting point?
11. The temperature 3
The temperature is -12 degrees Fahrenheit. During the following 5 hours the temperature decrease 23 degrees Fahrenheit what is the temperature at 11 pm?
12. Midpoints
Triangle whose sides are midpoints of sides of triangle ABC has a perimeter 45. How long is perimeter of triangle ABC?
13. Bitoo and Reena
Bitoo ate 3/5 part of an apple and the remaining part was eaten by his sister Reena. How much part of an apple did Renna eat? Who had the larger share? By how much?
14. On Sunday
On Sunday the temperature reached a high of 38° above 0. That night it dropped to 23° below 0. What is the difference between the high and low temperatures for Sunday?
15. The lowest
The lowest temperature on Thursday was 20°C. The lowest temperature on Saturday was 12°C. What was the difference between the lowest temperatures?
16. 3-bracket 3
Two angles in a triangle are 90° and 60°. Has triangle at least two equal sides?
17. 8 degrees
8 degrees Celsius it cools down by 9 degrees Celsius. What is the resultant temperature?