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

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

They appear to form a trapezoid

Step-by-step 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 with step-by-step explanation:

a. ∠j is supplementary to ∠k - true:

(opposite angles of a trapezoid are supplementary which means that they add up to 180 degrees)

b. kl is parallel to jm - true:

(opposite sides are parallel to each other in a trapezoid)

c. jk is perpendicular to kl - false:

(clearly, jk does not make a right angle with kl)

d. jk is parallel to lm - false:

(jk and lm are two lines opposite in direction to each other so they cannot be parallel)

e. ∠j is congruent to ∠m - true:

(the angles on each side of the base are congruent)

f. ∠j is congruent to ∠k - false:

(the angles on the same side but opposite side of the base are not congruent)