See the picture attached to better understand the problem
we know that
<span>the formula for calculate the sum of the internal angles in a regular polygon is
</span>Sum=(n-2)*180
for n=8
sum=(8-2)*180----> 1080°
1080°----> divide by number of sides
1080/8=135°
so
in the figure
∠ BAD=135°
∠ BAC=∠ BAD/2---> 135°/2---> 67.5°
∠ BAC=67.5°
the triangle ABC is an isosceles triangle
so
∠ ABC=∠ BAC
∠ ABC=67.5°
the sum of the internal angles of the triangle is equal to 180 degrees
∠ BCA=180-(67.5+67.5)------> 45°
∠ BCA=45°
t<span>he measures of the three angles in the isosceles triangle are
</span>
∠ BAC=67.5°∠ ABC=67.5°∠ BCA=45°
It really can't. If the sides of the triangle are equal, one can't be bigger or smaller then the other one! :-)
Answer:
x = 1
z = 1/2
Step-by-step explanation:
z = 3/y
z = 3/6
z = 1/2
x = 2z
x = 2(1/2)
x = 1
Don't cry please :(
1:
To find the Average (mean). Add up all the numbers together. Then divide by how many numbers there are.
So use the chart and do what I said :)
2:
To find the mean: Add up all the numbers together. Then divide by how many numbers there are.
To find the median: Put all the numbers in least to greatest. Then if there is a odd amount of numbers. It would be the number in the middle.
To find the mode: The mode is the number that occurs the most.
So use the chart and do what I said :)
Answer:
1) cos (3x)
2)
Step-by-step explanation:
Given expression:
cos(7x)cos(4x)+sin(7x)sin(4x)
By using the trigonometric identity
cos(a)cos(b) + sin(a)sin(b) = cos(a-b)
we have:
cos(7x)cos(4x)+sin(7x)sin(4x) = cos(7x - 4x)
= cos(3x)!
part 2:
tan (-π/12)
by using property tan(-x)= - tan(x)
=-tan(π/12)
= - tan(π/6 / 2)
Using tan(x/2) =
= -
cos π/6 =
= -
= -
= - 2+
=
!