Bantu Jawab dong ?…….

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Bantu Jawab dong ?…….​

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1. Mencari sudut x dan

Diketahui bahwa semua sudutnya merupakan sudut siku-siku ( 90° )

(a) 2x + 3x + x = 90°

6x = 90°

x = 15°

(b) 6x + 14x = 90°

20x = 90°

x = 4,5°

(c) 2x + 5x + 2x = 90°

9x = 90°

x = 10°

(d) b° + 37° = 90°

b° = 90° – 37°

b° = 53°

2. Menentukan besar

a. Nilai x

3x° + 45° + (2x° + 60°) = 180°

5x° = 180° – (45° + 60°)

5x° = 180° – 105°

5x° = 75°

x° = 15°

b. Sudut PQT = 3x°

Substitusi nilai x° = 15°

3x° = 3 × 15° = 45°

c. Sudut SQR = 2x° + 60°

Substitusi nilai x° = 15°

2 (15°) + 60° = 30° + 60°

= 90°


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