Answer:
DE = 80.
Step-by-step explanation:
Since the 2 lines are congruent:
5x = 3x + 32
2x = 32
x = 16
So DE = 3(16) + 32
= 48 + 32
= 80.
Answer:
53.13°
Step-by-step explanation:
Using Sine rule
b / Sin B = a / Sin A
5/ Sin90 = 4 /Sin A
5/1 = 4 /SinA
Sin A = 4/5
A = arc sin(0.8)
A = 53.13010
A = 53.13 °