10. Seven lengths of wood are needed to make this gate. Find the total length of wood needed, giving your answer in metres, correct to one decimal place. Chapter 23 Trigonometry -2.5m- 1.5m

The total length of wood needed is 15. 9 meters
The formula for calculating the perimeter of a rectangle is expressed with formula;
P = 2(l + w)
Such that the parameters given in the formula are;
Then, we have;
Width = 2. 5m
Length = 1. 5m
Total length = 2(1.5) + 4(2.5) = 3 + 10 = 13 + x meters
Using the Pythagorean theorem
x² = 6. 25 + 2. 25
x = 2. 92
Total length = 13 + 2. 92 = 15. 9 meters
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