Answer:
see explanation
Step-by-step explanation:
(a)
(the side required )² = sum of squares of other 2 sides - ( 2 × product of other 2 sides and cos(angle opposite side required ) )
x² = 12² + 15² - (2 × 12 × 15 × cos71°)
(b)
x² = 144 + 225 - 360cos71°
= 369 - 360cos71° ( take square root of both sides )
x =
≈ 16 cm ( to the nearest integer )
Answer:
An expression for the perimeter of the square as a product using the expression for the length of one side .
Step-by-step explanation:
Given : The perimeter of a square is represented by the expression feet.
To find : Write an expression for the perimeter of the square as a product using the expression for the length of one side ?
Solution :
We know that the perimeter of the square is 4 times the side of square.
The perimeter of a square is represented by the expression feet.
Divide the expression by 4,
So, the perimeter is also written as with length of side
Therefore, an expression for the perimeter of the square as a product using the expression for the length of one side .