49 < 52 < 64
sqrt (49) < sqrt (52) < sqrt (64)
7 < sqrt ( 52) < 8
the sqrt(52) is close to 7
Step-by-step explanation:
A=8B
A+B=180
8B+B=180°
9B=180°
B=20°
so
angle A =8×20=160°
angle B= 20°