bantuin jawab no 5,6,7 pls dengan caranya ya^^

5d] < QPO = < PQO = 40° (sama kaki)
e] < POQ = 180° - (< QPO + < PQO)
= 180° - (40° + 40°)
= 180° - 80°
= 100°
f] < PRQ = 1/2 × < POQ
= 1/2 × 100°
= 50°

6] L = 1/2 × 6 × 8 = 24 cm^2
abc = 6×8×10 = 480 cm^3
R = abc/4L
R = 480/4(24)
R = 480/96
R = 5 cm

7] S = 1/2 K
= 1/2 (20+13+21)
= 1/2×54
= 27 cm

L^2 = S(S-20)(S-13)(S-21)
L^2 = 27(27-20)(27-13)(27-21)
L^2 = 27(7)(14)(6)
L^2 = 15876
L = akar 15876
L = 126 cm^2
r = L/S = 126/27 = 4 18/27 = 4 2/3 cm