Question

Find the value of x

Answer 1

Answer:

Step-by-step explanation:

This is an Isosceles triangle, two of the angles are equal

A triangle has how many degrees in it?      180°

A two angles that form a line also has 180°  

Think of two right angles    90° + 90° = 180°  (I wish i could draw on this)

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90°|90°_

angle SRT = angle STR = 20°

angle STR + angle STU  = 180°

20° + angle STU = 180°                subtract 20° from both sides

         angle STU = 160°

         angle STU = 4x                  subs in 160°

                160° =  4x                     divideboth sides  by 4

                  40° = x     <----------------  FINAL ANSWER    D