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Texas Essential Knowledge and Skills Teaching Resources

Math 6.8

Expressions, equations, and relationships. The student applies mathematical process standards to use geometry to represent relationships and solve problems. The student is expected to:

(A)extend previous knowledge of triangles and their properties to include the sum of angles of a triangle, the relationship between the lengths of sides and measures of angles in a triangle, and determining when three lengths form a triangle;

(B)model area formulas forparallelograms, trapezoids, and triangles by decomposing and rearranging parts of theseshapes;

(C)write equations that represent problems related totheareaofrectangles, parallelograms, trapezoids, and triangles and volume of right rectangular prismswheredimensionsarepositive rational numbers; and

(D)determine solutions for problems involvingtheareaofrectangles, parallelograms, trapezoids, and triangles and volume of right rectangular prismswheredimensionsarepositive rational numbers.