30 degrees because it's a 30-60-90
Answer:
x=14.5
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Step-by-step explanation:
2x=29
Divide by 2 on both sides:
x=14.5
In the left hand side, you're multiplying 7.8 by 
In the right hand side, you're multiplying again 7.8 by a mysterious number.
So, the unknown number must be 
Every number remains unchanged when multiplied by 1, so the answer is 3.6
Answer:
72.54
Step-by-step explanation:
Use formula for trapezoid: a+b/2 * h