Answer:
45 degrees.
Step-by-step explanation:
All interior angles in a triangle add up to 180 degrees.
We can form an equation: x+x+65+25=180
2x+90=180
2x=90
x=45.
It's the first one, an algebraic expression contains variables
Answer:
Step-by-step explanation:
y=-1
The sum of all 3 angles is 180 degrees, you should be able to solve from here.
2.9
30
1/2(2.9)30
the same. despite different formulas.
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