A^2 + B^2 = c^2
12^2 + b^2 = 20^2
144 + b^2 = 400
-144 -144
b^2 = 256
sqrt(b^2) = sqrt(256)
b=16
x=16
You’re using the Pythagorean theorem to solve for this where (a) represents a side of triangle, (b) represents another side and (c) represents the hypotenuse.
Converting 25 degrees to radians:
180° = π radians.
1° = π/180 radians.
25° = (π/180 radians) * 25
= (25/180) * π radians.
Leaving the answer in terms of π, 25/180 = 5/36
= (25/180) * π radians = (5/36)π radians or ≈ 0.1389π radians.
Therefore 25° = (5/36)π radians or ≈ 0.1389π radians
I hope this explains it.
I think why you did not get it was because you did not leave your answer in terms of π or as a multiple of π, so as a multiple of π our answer is:
= (5/36)π radians or ≈ 0.1389π radians
(a)______________________
| 1 | 2 | 3 | 4 |
-------------------------------------------
Health | 7 | 14 | 21 | 28 |
Fire | 12 | 24 | 36 | 48 |
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(b) In 84 days, both inspectors will visit on the same day, because the LCM (least common multiple) of 7 and 12 is 84