no. 1 dan 2. pake caranya yaa.. plisss

1. a = RD = l. segitiga / 1/2 × kel segitiga

= 1/2 × 5 × 12 / 1/2 (5+13+12)
= 30 / 15
= 2 cm

b. 1/2 × 6 × 8 / 1/2 (6+8+10)
= 24 / 12
= 2 cm

2. a = RL = a.b.c / 4. L segitiga
=10 × 24 × 26 / 4 × 1/2 × 10 × 24
= 6240 / 480
= 13 cm

b.

= 12 × 16 × 20 / 4 × 1/2 × 12 × 16
= 3840 / 384
= 10 cm