Question

tolongin dong besok dikumpulkan​

Answer 1

Penjelasan dengan langkah-langkah:

BELAH KETUPAT ABCD

a) sudut ABC = 132°

sudut ABD = ½ × sudut ABC

sudut ABD = ½ × 132°

sudut ABD = 66°

b) sudut ADC = 2 × sudut BDC

sudut ADC = 2 × 25°

sudut ADC = 50°

c) sudut EBC = sudut ADC

2x + 10 = 5x – 20

2x – 5x = –10 – 20

–3x = –30

x = –30

–3

x = 10°

d) sudut CBD = sudut EDA

2x + 13 = 5x – 20

2x – 5x = –13 – 20

–3x = –33

x = –33

–3

x = 11°