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Geometric diagrams illustrating triangles and angles with labeled measurements and congruency marks.

A series of five geometric diagrams showing triangles with various angles and side markings, including a right triangle with a 24° angle, a triangle with angles 51° and 19°, an isosceles triangle with a 50° angle, a triangle with exterior angles 122°, and a quadrilateral with angles 63° and 37°.

A series of five geometric diagrams showing triangles with various angles and side markings, including a right triangle with a 24° angle, a triangle with angles 51° and 19°, an isosceles triangle with a 50° angle, a triangle with exterior angles 122°, and a quadrilateral with angles 63° and 37°.

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