7. The measures of the angles in a triangle are in the extended ratio of 3:4:5. Find the measures of the angles.
1=
2=
3=

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)

Math question.. plz me .. best answer all

I’m really confused and need your assist me with this question i’ve never been taught