Oklahoma Academic Standards
OK.6.GM. Geometry & Measurement (GM)
6.GM.1. Calculate area of squares, parallelograms, and triangles to solve real-world and mathematical problems.
6.GM.1.2. Develop and use formulas to determine the area of triangles.
6.GM.1.3. Find the area of right triangles, other triangles, special quadrilaterals, and polygons that can be decomposed into triangles and other shapes to solve real-world and mathematical problems.