tolong jawabin semuanya ya kak

1.L=a×t
=28×12
=336cm²
2.L=½×(a+b)×t
=½×(25+36)×20
=½×61×20
=610 cm²
3.L=½×d×d
=½×36×22
=396cm²
4.L=Π×r×r
=22/7×7×7
=154cm²