The sum of the angles in a triangle equal 180°. abc is a triangle. angle a is > 90°. using deductive reasoning, what can we conclude?

We know that all triangles have a sum of 180 degree. If one angle of a triangle is greater than 90 degrees than we conclude that:

1. It is an obtuse triangle

2. It will have one obtuse angle(greater than 90 and two acute angles(less than 90))

2. It is not a right triangle(which has one angle of 90 degree)

3. It is not an equilateral triangle(in which all angles are equal)

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

my answer is$ 12

step-by-step explanation:

because 15 -2=12