A = a+b/2 x h
Add sides a and b then divide by 2
After that multiply by the h
11 over 13 I think is the answer
All three angles on a triangle always equal 180°.
Example: 100°+40°+40°=180°
102+39=141°
180-141=39°
x = 39°
Answer:

Step-by-step explanation:
We want to subtract

from

We set up the subtracttion problem to get:

We expand the parenthesis to get:

Group similar terms:

We simplify to get:

Answer:
its the first one. you're right.
A reflection over y-axis.