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1. What is the perimeter of a square table that is 1.76 m long on each side?

2. A swimming pool is 20.7 m long and 15.8 m wide. What is its perimeter?

3. Willy put a glass top that fits a rectangular table, which is 1 3/4 m long and 1 1/3 m wide. What is the perimeter of the glass top?

4. The perimeter of an equilateral triangle is 115.5 cm. What is the perimeter of each side?

5. A rectangular door has a perimeter of 10.9 m. The door is 4.2 m long. How wide is the door?

Sagot :

1. What is the perimeter of a square table that is 1.76 m long on each side?
[tex]P =4s\\P=4(1.76m)\\P=7.04m[/tex]

2. A swimming pool is 20.7 m long and 15.8 m wide. What is its perimeter?
[tex]P=2(l+w)\\P=2(20.7+15.8m)\\P=2(36.5m)\\P=73m[/tex]

3. Willy put a glass top that fits a rectangular table, which is 1 3/4 m long and 1 1/3 m wide. What is the perimeter of the glass top?
[tex]P=2(l+w)\\P=2(1 \frac{3}{4}m+ 1 \frac{1}{3}m)\\P=2( \frac{9+4}{12})\\P=2( \frac{11}{12})\\P= \frac{22}{12}\\P= \frac{11}{6} =1 \frac{5}{6}m[/tex]

4. The perimeter of an equilateral triangle is 115.5 cm. What is the perimeter of each side?
[tex]P=3s\\115.5cm=3s\\ \frac{115.5cm}{3}= \frac{3s}{3}\\38.5cm=s[/tex]

5. A rectangular door has a perimeter of 10.9 m. The door is 4.2 m long. How wide is the door?
P = 2l + 2w
10.9 m = 2(4.2 m) + 2(w)
10.9 m = 8.4 m + 2w
10. 9 m - 8.4 m = 2w
[tex]P=2l + 2w\\10.9m=2(4.2m)+2w\\10.9-8.4=2w\\ \frac{2.5}{2} = \frac{2w}{2} \\1.25 m=w[/tex]

Therefore, the answer to your questions are...
1.) P = 7.04 m
2.) P = 73 m
3.) 1[tex] \frac{5}{6} [/tex] m
4.) 38.5 cm
5.) 1.25 m

I hope it help. ☺