-6x=19+17
-6x=36 /(-6)
x=-6
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A right angle is exactly 90 degrees.
Thus, your answer is option D
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For the given triangle, the tan of angle A equals 
Step-by-step explanation:
Step 1:
In the given triangle for angle A, the opposite side has a length of 6 cm, the adjacent side has a length of 8 cm while the hypotenuse of the triangle measures 10 cm. To calculate the tan of angle A we divide the opposite side's length by the adjacent side's length.

Step 2:
The opposite side's length = 6 cm.
The adjacent side's length = 8 cm.

Sin r = 20/29
SOHCAHTOA
R:
(O) opposite - 20
(A) adjacent - 21
(H) hypotenuse - 29
5(u+w) it is using distributive property.