Which property makes a rectangle a special type of parallelogram?

a. the opposite angles are congruent.
b. the diagonals are congruent.
c. the opposite sides are parallel.
d. the consecutive sides are congruent.

Option 'B' is correct.

Step-by-step explanation:

Since we know that

Properties of rectangle are:

1) Opposite angles are equal and right angles too.

2) Opposite sides are equal, so they can be equal.

3) Diagonals are congruent and bisect each other at right angle.

Properties of parallelogram are:

1) Opposite sides are parallel.

2) Opposite angles are equal.

So, Only if the diagonals are congruent , then it makes a rectangle a special type of parallelogram.

Hence, Option 'B' is correct.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl