Answer:

Step-by-step explanation:
Area of circle:

By using the area of a circle, we can get the area of a semicircle:

Let's convert the mixed fraction to an improper fraction and then a decimal:
=
= 
Now, we solved for the diameter, to get the radius, we need to divide the diameter by 2:

Now we have the radius, so we can plug in our values and find the area:


I = P x r x t
r = I/P x t
r = 310/1000 x 5
r = 0.62
r = 0.62 x 100
r = 62%
Cut only to ends of the triangle off then it will have a pentagon with the uncut shape
I hope this helps you
b (4b+19)
Step-by-step explanation:
x²=a²+b²
x=√6²+12²
x=√180
x=3√2v
y²=16²+12²
y=√400
y=20