Answer:

Step-by-step explanation:
This is an isosceles triangle, therefore you must <em>double</em><em> </em><em>up</em><em> </em><em>D</em><em>A</em><em> </em>to get 40.
I am joyous to assist you at any time.
35+55+a=180
90+x=180
-90. -90
A= 90
Answer:
The answer would be D
Hope my answer helps you and good luck!!!