The area of a circle is \pi r^2, where r is the radius of the circle. The diameter of a circle is the length of a line that passes through the center of the circle and stops at the perimeter of circle. The radius of a circle is half the diameter. Divide the diameter by 2 to find the radius. 1. 2.8 m / 2 = 1.4 m 2 . : Plug in the value we just found for r. 3. : Use the order of operations (PEMDAS). 4. The area of the circle is equal to
The answer is C <<<===== It can't be anything else. It is not a right angle. A>90 It can't be acute because one angle is greater than 90. It can't scalene because at least 2 of the angles (and 2 sides) are equal.