Isabelle proves that the triangles are congruent by using the parallel lines to determine a second set of angles are congruent. what statement and reason could she have used? ∠abc ≅ ∠bac; corresponding angles of parallel lines are congruent. ∠cab ≅ ∠dcb; alternate interior angles of parallel lines are congruent ∠abc ≅ ∠dcb; alternate interior angles of parallel lines are congruent ∠acd ≅ ∠abd; corresponding angles of parallel lines are congruent.

given that ab║dc and ∠a≈∠d, then to prove that abc is congruent to dcb isabelle will have to use sas (side-angle-side) postulate. this is because we have been given sides and angle that are equal to each other.

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.