Question

Solve the following triangles, Round to the nearest tenth

Answer 1

Answer:

I think B=25

Step-by-step explanation:

take 180-130-25=25

Answer 2

Answer:

B = 180 - 130 - 25 = 25

a = 6

c = 10.9

Step-by-step explanation:

the sum of all angles in a triangle is always 180 degrees.

so, we know 2 angles. we need to subtract them from 180 to get the third angle.

as it turns out, the angles at A and B are equal, and that means that also the corresponding side lengths must be equal : a = b = 6.

and for c we use the general Pythagoras

c² = a² + b² - 2ab×cos(C)

c² = 36 + 36 - 72×cos(130) = 118.28...

c = sqrt(118.28...) = 10.87569344... ≈ 10.9

just in case

36 + 36 - 72×cos(130) = 72 - 72×-0.64... =

= 72 + 72×0.64... = 118.28...