The length of the rectangle is 20 cm, which is 2 times its width, the perimeter of the rectangle and its area were calculated.
| December 12, 2020 | education
1 find out the width of the triangle 20: 2 = 10 cm
2 we recognize the perimeter by the formula: P = 2 (a + b) P = 2 (20 + 10) P = 60 cm
3 we find out the area by the formula: S = ab
S = 20 * 10 = 200 cm2
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