**Ohio Education Standards**. An area is the amount of surface a shape covers.

An area is measured in inches, feet, meters or centimeters. Read More...

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OH.GSS. Geometry and Spatial Sense: Students identify, classify, compare and analyze characteristics, properties and relationships of one-, two- and three-dimensional geometric figures and objects. Students use spatial reasoning, properties of geometric objects, and transformations to analyze mathematical situations and solve problems.

GSS.2. Grade Level Indicator: Characteristics and Properties: Use standard language to define geometric vocabulary: vertex, face, altitude, diagonal, isosceles, equilateral, acute, obtuse, etc.

GSS.B. Draw circles, and identify and determine the relationships among the radius, diameter, center and circumference.

OH.M. Measurement: Students estimate and measure to a required degree of accuracy and precision by selecting and using appropriate units, tools and technologies.

M.2. Grade Level Indicator: Use Measurement Techniques and Tools: Use strategies to develop formulas for finding circumference and area of circles, and to determine the area of sectors.

M.3. Grade Level Indicator: Use Measurement Techniques and Tools: Estimate perimeter or circumference and area for circles, triangles and quadrilaterals, and surface area and volume for prisms and cylinders by:

M.3.b. Measuring attributes (diameter, side lengths, or heights) and using established formulas for circles, triangles, rectangles, parallelograms and rectangular prisms.

M.C. Identify appropriate tools and apply appropriate techniques for measuring angles, perimeter or circumference and area of triangles, quadrilaterals, circles and composite shapes, and surface area and volume of prisms and cylinders.

OH.PFA. Patterns, Functions and Algebra: Students use patterns, relations and functions to model, represent and analyze problem situations that involve variable quantities. Students analyze, model and solve problems using various representations such as tables, graphs and equations.

PFA.J. Use formulas in problem-solving situations.