A triangle has angle measurements of 54°, 52°, and 74°. What kind of triangle is it?

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)

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

Which expression is the factorization of x^2+10+21