Plis buat besok dong tolong ya​

10.

cari panjang alas jajargenjang

a² = 39² – 15²

a² = 1.521 – 225

a² = 1.296

a = √1.296

a = 36 cm

Keliling

= (3 x 15 cm) + 39 cm + 36 cm

= (45 + 39 + 36) cm

= 120 cm

jawaban B

11.

BE² = AB² – AE²

BE² = 10² – 8²

BE² = 100 – 64

BE² = 36

BE = √36

BE = 6 cm

BD² = BC² – CD²

BD² = 13² – 5²

BD² = 169 – 25

BD² = 144

BD = √144

BD = 12 cm

panjang ED

= BD – BE

= 12 cm – 6 cm

= 6 cm

Jawaban C