Question

18a) what choice below states that the three angles of a triangle add to 180? *
definition of supplementary angles
definition of complementary angles
triangle sum theorem
triangle exterior angle theorem

18b) what choice below states that two angles add to 180? *
definition of supplementary angles
definition of complementary angles
triangle sum theorem
triangle exterior angle theorem

Explanation:

• Para 18a: El teorema de la suma de triángulos establece que la suma de los ángulos internos de un triángulo es de \(180^{\circ}\).
• Para 18b: La definición de ángulos suplementarios establece que la suma de dos ángulos es de \(180^{\circ}\).

Answer:

18a) triangle sum theorem
18b) definition of supplementary angles