Step-by-step explanation:
sec² x − 2 = 0
sec² x = 2
cos² x = ½
cos x = ±√½
x = π/4, 3π/4, 5π/4, 7π/4
M/_A= 120°
m/_B=30°
m/_C= 100°
sum of all the angles=120+30+100 = 250°
Answer:
0.34
Step-by-step explanation:
I just used a calculator
Since the surface area is the (edge length) ^2
if the (e. l) is multiplied by 1/2,
the surface area is multiplied by (1/2)^2 = 1/4