Use the cosine or sin rule, depending on the question.
Answer:
Step-by-step explanation:
Perimeter of a rectangle = 2(L+W)
L is the length of the triangle
W is the width
If the perimeter of a rectangle is represented by the expression 
In order to know what wat each part represents, we will rewrite the given equation in the form 2(L+W).
Given

Perimeter of a rectangle

Compare the given function with the perimeter to get L and W

Hence the following statements explain correctly what each part of the expression represents
- One side of the rectangle measures x (the length)
- One side of the rectangle measures 3x + 1 (the width)
- 2 is the coefficient in each term that represents 2 lengths and 2 widths in a rectangle.
All you need to do is use your calculator to solve that equation. Just so you don't need to for just this one, here's the answer you should type into the box:
3/20
Step-by-step explanation:
part 1 : explaining how to get the coordinates of B
part 2 : the gradient of BD
Answer:7
Step-by-step explanation: