Jawab:
Luas = 540 cm²
Keliling = 45+√2392 cm (jika sama kaki)
Keliling = 69+√601 cm (jika siku-siku)

Penjelasan dengan langkah-langkah:

Diketahui:
trapesium
a = 20 cm
b = 25 cm
t = 24 cm

Dicari luas
Luas = (a+b)(t/2)
Luas = (20+25)(24/2)
Luas = 45×12
Luas = 540 cm²

Dicari keliling
Jika sama kaki
c = √(t²+((b-a)/2)²)
c = √(24²+((25-20)/2)²)
c = √(24²+(5/2)²)
c = √(576+(25/4))
c = √((2304/4)+(25/4))
c = √(2392/4)
c = (√2392)/2

Keliling = a+b+c+c
Keliling = 20+25+2((√2392)/2)
Keliling = 45+√2392 cm (jika sama kaki)

Jika siku-siku
c = √(t²+(b-a)²)
c = √(24²+(25-20)²)
c = √(24²+5²)
c = √(576+25)
c = √601

Keliling = t+a+b+c
Keliling = 24+20+25+√601
Keliling = 69+√601 cm (jika siku-siku)

<(7o7)>