kak tolong jawab ya pake caranya

mencari panjang OQ,=
a* = c* - b*
a* = 20* - 16*
a* = 400 - 256
a* = 144
a = 12 cm

mencari panjang PQ =
c* = a* + b*
c* = 9* + 12*
c* = 81 + 144
c* = 225
c* = 15 cm

kelilingnya =
RQ + RS + PQ + SP
20 + 20 + 15 + 15
= 70 cm

Luasnya =
1/2 x d1 x d2
1/2 x (16 + 9) x ( 12 + 12)
1/2 x 25 x 24
= 25 x 12
= 300 cm*