The formula for the area of a triangle is area=

. So when you plug in the given values: Area=

. When you convert all the numbers to fractions: Area=

. You multiply across the numerators and divide by the product of the denominators and get 137.25

.
Answer:
They are not similar
Step-by-step explanation:
Angles dont match
The correct option is: A. 80 cm³
Explanation
Diameter of the coin,
cm.
So, the radius,
cm.
As the coin is circular, so..
Area of each circular surface,
cm²
Now for finding the amount of plastic for making each coin, we will find the Volume of each coin first.
As the thickness (
) of the coin is 0.5 cm, so Volume of each coin,

As you need to make a batch of 50 coins, so the total volume of 50 coins
[Rounded up to the nearest multiple of 10 cm³]
So, the amount of plastic you will need for making a batch of 50 coins is 80 cubic centimeter.
F - 3/4 = 5/6
Add 3/4 to both sides to get
F = 5/6 + 3/4 = 19/12