1) A= b*h - 2(πr²)
= 40*20 - 2(3,14*10²)
=800-2(3,14*100)
=800-2(314)
=800-628
=172cm² es el área sombreada
2) A=b*h-(b*h)/2
=15*12-(5*12)/2
=180-60/2
=180-30
=150cm² es el área sombreada
2p=15+12+10+x
Hallamos x:
x²=12²+5²
x²=144+25
x²=169
x=√169
x=13cm
2p=15+12+10+13
=27+23
=50cm
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
1) A= b*h - 2(πr²)
= 40*20 - 2(3,14*10²)
=800-2(3,14*100)
=800-2(314)
=800-628
=172cm² es el área sombreada
2) A=b*h-(b*h)/2
=15*12-(5*12)/2
=180-60/2
=180-30
=150cm² es el área sombreada
2p=15+12+10+x
Hallamos x:
x²=12²+5²
x²=144+25
x²=169
x=√169
x=13cm
2p=15+12+10+13
=27+23
=50cm