Answer:
64π or 201.0619298297
Step-by-step explanation:
Area of a circle: πr²
To find r, the radius of the circle, take the diameter (16) and halve it to get 8. You can now place 8 into the equation to get π8². Square 8 to get 64. You now now have π64, or 201.0619298297.
L = 20 W = 1
L = 10 W = 2
L = 5 W = 4
Study this carefully. It's a good problem to know how to do. The ancients solved problems by using this method. They started with biggest number they could on the left and multiply each number on the right as they went down (in this case by 2).
Answer:
Step-by-step explanation:
Given
The above triangle
First, we calculate the length LM using Pythagoras theorem.
Collect like terms
Take positive square root
Solving (a): Sin L
Simplify
Solving (b): tan N
Simplify
Solving (c): cos L
This calculated as:
Simplify
Solving (d): sin N
This is calculated using:
If 
Then: 
So:
