The meaning of the area is the measurement of a surface in this case a circle, which can be find by using the formula

, where
r is equal to the radius of the circle.
In this exercise is given that the diameter of a standard cardboard is 18 inches or a radius of 9 inches and it is asked to find its area. Therefore, to find the area of the circle you should substitute the value of the radius into the previous mention formula.



The area of the standard dartboard is 254.47 square inches or 254 square inches.
Answer:
Inverse property of multiplication
We know that there are 3 feet in one yard. So, to find out how many yards is equivalent to 16 feet, we must divide this number by 3.
16/3 or 5 1/3
Therefore, 16 feet is equal to 16/3 or 5 1/3 yards.
Hope this helps!
Answer:
Step-by-step explanation:
Longer side =18
side opposite to 30=18/2=9
third side=√(18²-9²)=9√3
Answer:
294
Step-by-step explanation: