Please help if you can thanks ^^

Given:

AD is an angle bisector in triangle ABC. .

To find:

The value of .

Solution:

AD is an angle bisector in triangle ABC.

According to the angle sum property, the sum of all interior angles of a triangle is 180 degrees.

Using angle sum property in triangle CAD, we get

Therefore, the angle of angle ADC is .

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

where is abdul's work? don't see that anywhere posted : /

step-by-step explanation: