Use the Cosine Rule:-
AC^2 = 6^2 + 8^2 - 2*6*8 cos 78
= 80.04
So AC = sqrt 80.04 = 8.9 to nearest tenth
Answer:
b, x = 17
Step-by-step explanation:
A right angle (as shown by the box in the corner of the angle) is 90°.
So, the two angles have to add up to 90°.
22 + 4x = 90
Subtract 22 from both sides.
4x = 68
Divide both sides by 4.
x = 17
The answer is b, 17
Hope this helps! Feel free to ask any questions! :)
Hmmm yes that’s a good question
