在△ABC中,∠c=90°,则有:a^2+b^2=c^2
1.a=5 b=15
c^2=5^2+15^2=250
c=5√10
2.a=15 c=25
b^2=c^2-a^2=25^2-15^2=400
b=20
3.c=61 b=60
a^2=c^2-b^2=61^2-60^2-121
a=11
4.a:b=3:4 c=10
令a=3t,b=4t
a^2+b^2=c^2
25t^2=100
t=2
则:a=3t=6,b=4t=8
在△ABC中,∠c=90°,则有:a^2+b^2=c^2
1.a=5 b=15
c^2=5^2+15^2=250
c=5√10
2.a=15 c=25
b^2=c^2-a^2=25^2-15^2=400
b=20
3.c=61 b=60
a^2=c^2-b^2=61^2-60^2-121
a=11
4.a:b=3:4 c=10
令a=3t,b=4t
a^2+b^2=c^2
25t^2=100
t=2
则:a=3t=6,b=4t=8