Answer:
A = 172.0 in²
Step-by-step explanation:
Exterior angle of any side is 360 / 5 = 72°
Interior angle between any two adjacent sides is 180 - 72 = 108°
A regular pentagon can be thought of as 5 isosceles triangles with two common angles of 108 / 2 = 54°
The height of each triangle is
h = (10/2)tan54
The area of each triangle is ½(10)h = ½(10)(10/2)tan54 = 25tan54
The area of the pentagon is
A = 5(25tan54) = 125tan54 = 172.04774005...
A = 172.0 in²
Answer:
35 degrees, 60 degrees, and 55 degrees
Step-by-step explanation:
I'm not sure what you're trying to ask for the answer, but I'm assuming it's the degrees.
Think about it: A right triangle automatically has a 90 degree angle, and it already gave one of the degrees as 35 degrees. Adding those up, it equals 125 degrees. 180 (sum of degrees in a triangle) -125=55 degrees.
Therefore, the triangle's degrees are 35, 55, and 60 degrees.
hope this helped!~
75 minus 31 would be your answer of n
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use the formula V*t=x so if the velocity is 8 2/3 miles per hour and you need to travel 5 1/5 miles then (8 2/3)*t=5 1/5,
so t=(5 1/5)/(8 2/3)= .6 hours
Guest Oct 30, 2016