Bantu jawab jangan ngasal​

Penjelasan dengan langkah-langkah:

1.

a.

70 + 30 + x = 180

100 + x = 180

x = 180 – 100

x = 80°

b.

2x + 4 + 4x + 7 + 8x + 1 = 180

2x + 4x + 8x + 4 + 7 + 1 = 180

14x + 12 = 180

14x = 180 – 12

14x = 168

x = 168/14

x = 12

Besar sudut masing-masing

2x + 4 = 24 + 4 = 28°

4x + 7 = 48 + 7 = 55°

8x + 1 = 96 + 1 = 97°

2.

a.

AB² + BC² = AC²

10² + 24² = AC²

100 + 576 = AC²

676 = AC²

26 = AC

b.

Panjang AC

12² + 9² = AC²

144 + 81 = AC²

225 = AC²

15 = AC

Panjang AD

15² + 8² = AD²

225 + 64 = AD²

289 = AD²

17 = AD

3.

KL² = KM² – LM²

KL² = 13² – 12²

KL² = 169 – 144

KL² = 25

KL = 5

Jadikan jawaban terbaik ya~

Semoga membantu ^_^