Answer:
A) a = 108°
B) b = 24°
Step-by-step explanation:
A) The formula used to calculate the interior angle of any polygon is;
θ = 180(n - 2)/n
where;
n is the number of sides that the regular polygon has
θ is the interior angle
This polygon with angle a has 5 sides.
Thus;
a = 180(5 - 2)/5
a = 108°
B) Looking at the image again, we have 2 equilateral triangles and 1 isosceles triangle.
So the point of the ap ex of the unshaded triangle, the angle at that point is 360°
All angles in an equilateral triangle is 60°. Thus, ap ex angle of isosceles triangle is;
360 - (108 + 60 + 60)
360 - 228 = 132°
Now, the other two angles of the unshaded isosceles triangle are equal.
Thus;
2b + 132 = 180 (sum of angles in a triangle)
2b = 180 - 132
2b = 48
b = 48/2
b = 24°
Answer:
I can help you because I am learning the same time. ok
Step-by-step explanation:
1 step (5x-2) = (8x-7)
expand (8x-7) = 8x-7 so 5x-2=8x-7
add 2 to both side 5x-2+2=8x-7+2
simplify 5x=8x-5
subtract 8x from both side 5x-8=8x-5-8
simplify -3x=5
divide both sides by -3
3x 3 =5x
simplify x=5 over 3
Answer:
1 it 111111111111111111111111111111111111
Step-by-step explanation:
Answer:
B is the wrong one
Step-by-step explanation:
-7 is less than -9
To get perimeter you add all the sides together. You have 2 sides of 10ft, one side of 8ft and then the half circle. To find the arc length of the half circle you would do 1/2(2πr) which would give you πr. R=4ft since the diameter is 8ft. So you would add 8,10,10 and 4pi. If it wants an exact answer it would be 28+4pi. If it wants an approximate answer it would be 40.6ft
