All angles in a triangle add to 180 so
B = 180 - 90 - A
B = 90 - 20.8
B = 69.2
Can find b with tangent of A
tangent is opposite over adjacent.
opposite to A = 20.8 is 11.2 and adjacent is b
tan(20.8) = 11.2 / b
b = 11.2 / tan (20.8)
b = 29.5
c can be found with sine of A
sin(20.8) = 11.2 / c
c = 11.2 / sin(20.8)
c = 31.5
B = 69.2°, b = 29.5, c = 31.5
I believe 20 but I’m not sure
Because this is an isosceles triangle, 3x = x + 10. Thus, 2x + 10 and x = 5.
With x=5, MN has the length 5+10, or 15.
C. The perimeter of square ABCD is 4 times the perimeter of square PQRS.
