Answer:
25
Step-by-step explanation:
because there are vertical angles
Answer:
Step-by-step explanation:
Exterior angle = 360/n
= 360/13
= 27.7°
Answer:
A = 35 cm^2
Step-by-step explanation:
The area of a triangle is
A = 1/2 bh where b is the base and h is the height
A = 1/2 ( 10)(7)
A = 35 cm^2
I wanna day, that both are correct because they substituted the same value into both expressions and the results are the same.
Both squares substitute in 6 and both equal -5.
We can employ a simple repeated decimal trick:
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Alternatively, we can compute the partial sum of the series.
As 
, the second term vanishes and we're left with 
. Notice that this is really just a more formal version of the earlier trick.
