Question

Arrange the three congruent triangles so that angles one and three are adjacent to one another and angle two is adjacent angles one and three.

and if you can answer the rest please

Answer 1

We can notice about the three angles that their addition is equal to 180°

They appear to form a trapezoid

Explanation:

In the picture attached, the arrangement is shown.

The triangle postulate states that the sum of the angles of a triangle is two right angles. In this case, ∠1 + ∠2 + ∠3 = 180° (see the picture)

Answer 2

a] From the arranged angles, we notice that the triangle is right angles triangle and the corresponding angles are equal to each other. Such that the angle sizes are the same. The corresponding sides are also equal to each other because they appear to be of the same size.

b] The angles appear to form a set of triangles which are congruent to each other, this is because the corresponding angles and sides are equal.