Find the length of UT and the measure of angle R A. UT= 104, m angle R=113
B. UT= 104, m angle R=126
C. UT= 112, m angle R=126
D. UT= 126, m angle R=104

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.

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are

c

step-by-step explanation: