One side of the triangle is 4/5 dm, the second is 1/10 dm of the length of the first, and the third is 7/20 dm

univerkov | September 4, 2021 | education

One side of the triangle is 4/5 dm, the second is 1/10 dm of the length of the first, and the third is 7/20 dm shorter than the second. What is the perimeter of the rectangle?

1st side of the triangle – 4/5 in.

2nd side of the triangle – 4/5 dm + 1/10 dm.

3rd side of the triangle – (4/5 dm +1/10 dm) – 7/20 dm.

The perimeter of a triangle is the sum of all sides.

4/5 + 1/1 0 = 8/10 + 1/10 = 9/10 dm – the length of the 2nd side.

9/10 – 7/20 = 18/20 – 7/20 = 11/20 dm – the length of the 3rd side.

Perimeter:

4/5 + 9/10 + 11/20 = 16/20 + 18/20 + 11/20 = 45/20 =

= 2 whole 5/20.

Reduce the fraction 5/20 by 5 to get 1/4.

Answer: 2 point 1/4.

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