Answer:
20.08553692319
Step-by-step explanation:
We want to find the value of
Recall that 
is the base of the natural logarithm.
You can find this on your scientific calculator as a secondary function;
Enter 
on your scientific calculator and press the equal to sign.
You should see the result;
20.08553692319
The two slanted lines BC and AD are the same, then AD should be the same length, 27.
Answer:
You can just cancel out on both sides and find the value of the variable.
Answer:
XW = SR THATS IT I THINK??
The length of the altitude AD is 12 units.
<h3>How to find the height of a triangle?</h3>
The height of the triangle can be found as follows:
We have to find an angle using cosine law before we can find the height.
Therefore,
20² = 13² + 21² - 2 × 21 × 13 cos B
400 = 169 + 441 - 546 cos B
400 - 610 = - 546 cos B
-210 = - 546 cos B
cos B = -210 / -546
cos B = 0.38461538461
B = cos⁻¹ 0.38461538461
B = 67.3810899783
B = 67.38°
Hence,
sin 67.38° = opposite / hypotenuse
sin 67.38° = AD / 13
cross multiply
AD = 13 sin 67.38°
AD = 11.9999882145
AD = 12 units
learn more on triangle here: brainly.com/question/13387814
#SPJ1
