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What is the radius and diameter if the area of a circle is 81 square units?
Wiki User
∙ 13y ago
pi*radius squared = 81 square units
Divide both sides by pi and then square root both sides to find the value of the radius.
radius = 5.077706252 or 5 units in length to one significant figure
2 times radius = diameter = 10 units in length
Wiki User
∙ 13y ago
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What is the radius of a circle?
The radius of the circle is the length between the middle of the circle and any of the sides. It is also half the lenght of the diameter.
If the diameter is 14 What is the radius?
The radius of a circle is half the diameter.
If the radius of a circle is 20 what is the diameter?
The radius is 1/2 of the diameter, so if the radius is 20 units then the diameter is 40 units. You multiply the radius by 2 to get the diameter.
What is the circumference of 24 pie a circle with a radius of 6 units and a circle with a radius of 12 units and a circle with a diameter of 12 units and a circle with a diameter of 24 units?
Circumference = 2 x pi x radius = 24 pi 2 x radius = 24 ; radius = 12 units
What is the area of a circle with the radius of 5?
A circle with a radius of 5 units has an area of 78.54 square units.
What is the diameter of a circle if the radius is 2?
A circle with a radius of 2 units has an area of 12.57 square units.
What is the radius of circle with a diameter of 42.8?
1,438.72 square units.
What is the diameter of a circle if the radius is 4 units?
8 units; the diameter of a circle is twice its radius.
A circle has a radius of 15 Find the diameter and the area?
diameter = 30 units area = 225*pi square units
If the circumference of a circle is 3 pi then what is the radius and the diameter?
The radius of the circle is 1.5 units and the diameter is 3 units.
What is the radius of a circle if it has a diameter of 60 units?
Radius = 1/2 of the diameter = 30 units
What is the radius of a circle?
The radius of the circle is the length between the middle of the circle and any of the sides. It is also half the lenght of the diameter.
If the diameter is 14 What is the radius?
The radius of a circle is half the diameter.
How do you find area if you know the diameter?
radius = diameter/2 area of a circle in square units = pi*radius2
What is the area of a circle with a diameter of 50?
Diameter = 50 units so the radius will be 25 units Area of a circle = pi*radius2 = pi*252 = 1963.495408 square units Or: 1963.5 square units correct to one decimal place.
What is the area of a circle if it has a diameter of 153.86?
diameter = 153.86 units so the radius is half of this and will = 76.93 units area of a circle = pi*radius2 area = pi*76.732 = 18496.10444 square units
If the radius of a circle is 20 what is the diameter?
The radius is 1/2 of the diameter, so if the radius is 20 units then the diameter is 40 units. You multiply the radius by 2 to get the diameter.
