Specifically, a circle is a simple closed curve that divides the … Radius is a radial line from the focus to any point of a curve. Look at the graph below, can you express the equation of the circle in standard form? The circle in primary-school geometry: how children learn about the circumference, radius and diameter in KS2 shape and space. Look at this image: Use the calculator above to calculate the properties of a circle. find the radius of the plot. The radius of a circle when the circumference is given is the distance from the center outwards provided the value of circumference is given and is represented as. Hence the distance between the two parallel tangents will be the diameter of the circle. See the answer. Therefore, the radius and the area of the circle are 5 cm and 78.5 cm 2 respectively. What is the radius of a circle with the following equation: x^2 – 6x + y^2 – 4y – 12 = 0? In classical geometry, a radius of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.The name comes from the Latin radius, meaning ray but also the spoke of a chariot wheel. Given the area, A A, of a circle, its radius is the square root of the area divided by pi: What is the radius of a flat circle when it is placed in a uniform electric field magnitude of 4.6 x 10 2 N/C? Hence diameter of circle = 2 × radius. A circle is a shape with all points at the boundary having the same distance to the centre. Problem Answer: The radius of the circle is 5. The area of a circle is the space it occupies, measured in square units. Radius means the straight line distance from the center of a circle to its edge. [2] X Research source The symbol π{\displaystyle \pi } ("pi") is a special number, roughly equal to 3.14. A circle is a set of all points in a plane that are all an equal distance from a single point, the center. The Electric Flux Through The Circle When Its Face Is 45° To The Field Lines Is 74.49 Nm2/C. A circle can have many radii (the plural form of radius) and they measure the same. The radius is half the diameter, so the radius is 5 feet, or r = 5. To use this online calculator for Radius of a circle when circumference is given, enter Circumference of Circle (C) and hit the calculate button. The formula to calculate the circumference if you know the radius is as follows: or, when you know the Circumference: A = C2 / 4π. If the diameter ( d) is equal to 10, you write this value as d = 10. The diameter is two times the radius. View Solution: Latest Problem Solving in Analytic Geometry Problems (Circles, Parabola, Ellipse, Hyperbola) More Questions in: Analytic Geometry Problems (Circles, Parabola, Ellipse, Hyperbola) Online Questions and Answers in Analytic Geometry … Expert Answer . Circumference Perimeter of a Semicircle when circumference of circle is given, Perimeter=(Circumference of Circle/2)+Diameter, Area of a Circle when circumference is given, Area=((Circumference of Circle)^2)/(4*pi), Diameter of a circle when circumference is given, Radius of a circle when diameter is given, Diameter of a circle when radius is given, Inscribed angle when radius and length for minor arc are given, Inscribed angle when radius and length for major arc are given, Central angle when radius and length for major arc are given, Central angle when radius and length for minor arc are given, Side of a Kite when other side and area are given, Side of a Kite when other side and perimeter are given, Side of a Rhombus when Diagonals are given, Area of regular polygon with perimeter and inradius, Measure of exterior angle of regular polygon, Sum of the interior angles of regular polygon, Area of regular polygon with perimeter and circumradius, Side of Rhombus when area and height are given, Side of Rhombus when area and angle are given, Side of a rhombus when area and inradius are given, Side of a Rhombus when diagonals are given, Side of a rhombus when perimeter is given, Side of a rhombus when diagonal and angle are given, Side of a rhombus when diagonal and half-angle are given, Diagonal of a rhombus when side and angle are given, Longer diagonal of a rhombus when side and half-angle are given, Diagonal of a rhombus when side and other diagonal are given, Diagonal of a rhombus when area and other diagonal are given, Diagonal of a rhombus when inradius and half-angle are given, Smaller diagonal of a rhombus when side and half-angle are given, Area of a rhombus when side and height are given, Area of a rhombus when side and angle are given, Area of a rhombus when side and inradius are given, Area of a rhombus when inradius and angle are given, Diagonal of a rhombus when other diagonal and half-angle are given, Area of a rhombus when one diagonal and half-angle is given, Inradius of a rhombus when height is given, Inradius of a rhombus when area and side length is given, Inradius of a rhombus when area and angle is given, Inradius of a rhombus when side and angle is given, Inradius of a rhombus when one diagonal and half-angle is given, Inradius of a rhombus when diagonals are given, Inradius of a rhombus when diagonals and side are given, Length of a chord when radius and central angle are given, Length of a chord when radius and inscribed angle are given, Value of inscribed angle when central angle is given, Length of arc when central angle and radius are given, Area of sector when radius and central angle are given, Midline of a trapezoid when the length of bases are given, Area of a trapezoid when midline is given, Radius of the circle circumscribed about an isosceles trapezoid, Radius of the inscribed circle in trapezoid, Sum of parallel sides of a trapezoid when area and height are given, Height of a trapezoid when area and sum of parallel sides are given, Third angle of a triangle when two angles are given, Lateral Surface area of a Triangular Prism, Height of a triangular prism when base and volume are given, Height of a triangular prism when lateral surface area is given, Volume of a triangular prism when side lengths are given, Volume of a triangular prism when two side lengths and an angle are given, Volume of a triangular prism when two angles and a side between them are given, Volume of a triangular prism when base area and height are given, Bottom surface area of a triangular prism when volume and height are given, Bottom surface area of a triangular prism, Top surface area of a triangular prism when volume and height are given, Lateral surface area of a right square pyramid, Lateral edge length of a Right Square pyramid, Surface area of an Equilateral square pyramid, Height of a right square pyramid when volume and side length are given, Side length of a Right square pyramid when volume and height are given, Height of a right square pyramid when slant height and side length are given, Side length of a Right square pyramid when slant height and height are given, Lateral surface area of a Right square pyramid when side length and slant height are given, Surface area of a Right square pyramid when side length and slant height are given, Volume of a right square pyramid when side length and slant height are given, Lateral edge length of a Right square pyramid when side length and slant height are given, Slant height of a Right square pyramid when volume and side length are given, Lateral edge length of a Right square pyramid when volume and side length is given. 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