Odpowiedź :
a)
a = √(2² + 2²) cm = √(4 + 4) cm = √(4 * 2) cm = 2√2 cm
b)
(7√2)² cm² = b² + b²
98 cm² = 2b²
b² = 98/2 cm² = 49 cm²
b = √49 cm = 7 cm
c)
c² + c² = 5² cm²
2c² = 25 cm²
c² = 25 cm² : 2 = 12,5 cm²
c = √12,5 cm = √(125/10) cm = 5√5/√10 cm = 5√50/10 cm = 25√2/10 cm =
= 5√2/2 cm
d)
d² = 5² cm²+ 5²cm² = 25cm² + 25cm² = 50cm²
d = √50 cm = 5√2 cm
a)
a=2√2 cm
b)
b√2=7√2|:√2
b=7cm
c)
c√2=5|:√2
c=5/√2*√2/√2
c=5√2/2cm
d)
d=5√2cm
e)
e= 4√5*√2
e=4√10cm
f)
f√2=8|:√2
f=8/√2*√2/√2
f=8√2/2
f=4√2cm