Question

Q.(MTK Sekolah menengah pertama kelas : 7)

soalnya ada di gambar

pake cara
no ngasal​

Answer 1

Jawaban:

a.

2A + 84° = 180° (berpelurus)

2A = 180° - 84°

2A = 96°

A = 96°/2

A = 48°

5B = 105° (bertolakbelakang)

B = 105°/5

B = 21°

7C + 40° = 180° (berpelurus)

7C = 180° - 40°

7C = 140°

C = 140°/7

C = 20°

6D + 130° = 180° (berpelurus)

6D = 180° - 130°

6D = 50°

D = 50°/6

D = 8,33°

b.

A+B+3C = 48° + 21° + 3(20°)

= 69° + 60°

= 129°

c.

2B+2C+3D = 2(21°) + 2(20°) + 3(8,33°)

= 42° + 40° + 25°

= 107°

Semoga membantu ya...