Question

bantu bang lagi butuh pakai caranya juga ​

Answer 1

Penjelasan dengan langkah-langkah:

4.

3x° + 4x° = 180° - 40°

7x° = 140°

x = 20°

∠A = 3x = 3(20) = 60°

5.

LBCD = LABD - LACD

LBCD = ½(12×10) - ½(4×10)

LBCD = 60 - 20

LBCD = 40cm²

6.

∠ADB = 180-64-44 = 72°

∠ADE = 180° -∠ADB

= 180-72 = 108°