![]() ![]() Solution: Step 1: Write down the formula:Īnswer: The area of the circle is 25π ≈ 78.55 square inches.Įxample 2: Find the area the circle with a radius of 10 inches.Īnswer: The area of the circle is 100π ≈ 314.2 square inches. To calculate the area and circumference of a circle.Ĭircle Problems Worksheet to calculate problems that involve the radius, diameter, circumference and area of circle.Įxample 1: Find the area the circle with a diameter of 10 inches. Since the formula is only given in terms of radius, remember to change from diameter toĬircles Worksheet to calculate the area of a circle. It is given by the formula:Ī = πr 2 (see a mnemonic for this formula) When first studying circles, many students often confuse the diameter and the radius. The area of a circle is the region enclosed by the circle. If you are given the radius then use the formula C = 2πrĬircumference Worksheet to calculate the circumference of a circle.Īrea & Circumference Worksheet to calculate the area and circumference of a circle. ![]() If you are given the diameter then use the formula C = πd Where C is the circumference, d is the diameter and r is the radius. The formula for the circumference of a circle is The circumference of a circle is the distance around a circle.Ĭalculating the circumference of a circle involves a constant called pi with the symbol π. It touches the circle at point B and is perpendicular to the radiusĪ secant is a straight line that cuts the circle at two points. In the above diagram, the line containing the points B and C is a tangent to the circle. Lumos Expressions & Equations and Geometry Skill Builder, Grade 7 - Equations or Inequalities, Circles and Angles: Plus Online Activities, Videos and Apps. A tangent is perpendicular to the radius at the point of contact. The diameter would be the longest chordĪ tangent to a circle is a line that touches a circle at only Build your students' confidence in geometry by practicing shape identification, division, and measurement. The diameter is a specialĬhord that passes through the center of the circle. ![]() All theĭiameters of the same circle have the same length.Ī chord is a line segment with both endpoints on the circle. That passes through the center of the circle and has its endpoints on the circle. The diameter of a circle is a line segment That distance is known as the radius of the circle. On a planeplane that are the same distance from its center O. In geometry, a circle is a closed curve formed by a set of points Scroll down the page for more examples and explanations. The following figures show the different parts of a circle: tangent, chord, radius, diameter, arc, segment, sector. We shall learn about circles and the properties of circles. ![]()
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