GIVING BRAINLIEST, CANT SLEEP TIL THIS IS DONE. (basic geometry) put the points up in hopes of an answer. someone mind showing me how to do this?

Step-by-step explanation:

11.

The triangle is isosceles

Equal sides have length of

13.

The triangle is isosceles

x is one of the angles of a right triangle

The other angle of this triangle is same as corresponding angle = 63°

Step-by-step explanation:

11.  isosceles triangle with two equal side lengths

     5x - 11 = 3x - 3

     5x - 3x = 11 - 3

     2x = 8

      x = 8 / 2

      x = 4

13. isosceles triangle mirrored right triangle

    with angles 63°, 90° and x , find x

    90 + 63 + x

    90 - 63 = x

     x = 27°  

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.