Answer:
The height of the equilateral triangle is 
Step-by-step explanation:
we know that
An equilateral triangle has three congruent sides, and three congruent angles that each measure 60 degrees
To find out the height of an equilateral triangle, apply the Pythagoras Theorem in the right triangle ABD
Remember that the height of an equilateral triangle bisects the base.
see the attached figure to better understand the problem

substitute the given values

Solve for BD




simplify
`
therefore
The height of the equilateral triangle is 
Angles 1 and 2
Angles 3 and 4
Angles 5 and 6
Refer to the image attached.
Since, we have to divide the polynomial
by (x+2) using synthetic division.
We will divide the coefficients 4 -2 3 by -2
First term = 4 will remain same.
Second term = 
So, second term = -10
Third term = 
So, third term = 23
So, 4 -10 23 is the correct answer
So, Option 2 is the correct answer.