Answer:
1.
2 and 3: See explanation
Step-by-step explanation:
Solving (1)
--- radius
The area is:
There are no enough information to solve (2) and (3) as the radius and/or diameter are not provided.
However, the following formula will be used to calculate the required areas.
--- same process as (1)
Draw a x on the square to make 4 triangles. triangles have a total of 12 sides.
4×2=8. 100×2=200
8% out of 200
so
4=8 if you have double, 200
1. cbd
2. 40 degrees + 25 degrees =65 degrees
3. 70 degrees - 45 degrees =25 degrees