Yang pinter Matematika tolong dong

Jawab:

1. π rad = 180°

x° = [180*(besar rad)]/π

a. 2π/9 rad = [180*((2π)/9)]/π = 40°

b. π/12 rad = [180*((π)/12)]/π = 15°

c. 12π/20 rad = [180*((12π)/20)]/π = 108°

2. Rumus = π/180 radian per derajat

a. 30 * π/180 = π/6 rad (1/6π rad)

b. 135 * π/180 = 3π/4 rad (3/4π rad)

c. 240 * π/180 = 4π/3 rad (4/3π rad)

semoga bermanfaat jangan lupa jadikan jawaban terbaik