Question

PLEASE HELP!!!!!!
Look at the figure. Find the value of x.


A.) 90


B.) 30


C.) 15


D.) 45

Answer 1

Answer:

15

Step-by-step explanation:

An isosceles triangle has equal base angles.

Hence,

$3x=5x-30\\

\implies 30=2x\\

\implies x=15$

Answer 2

Answer:

C

Step-by-step explanation:

Well all triangles need to be equal to 180°. When you substitute a, b, and d in for x, the result are bigger than 180 not including the 3rd angle. With C the angles equal 45° and 45° angle which leave the appropriate sized angle for the 3rd angle at 90°. So x is equal to 15.