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<ACB = 90°
<ABC = 180° - (42° + 90°)
<ABC = 180° - 132°
<ABC = 48°
2. a. 2x + 3x + 90° = 180°
5x + 90° = 180°
5x = 180° - 90°
5x = 90°
x = 18°
b. <LKM = 2x
<LKM = 2(18°)
<LKM = 36°
c. <LMK = 3x
<LMK = 3(18°)
<LMK = 54°
3. Kurang tau :"
4. PQ = 17 cm
PR = 8 cm
QR = PQ² - PR²
QR = 17² - 8²
QR = 289 - 64
QR = √225
QR = 15 cm
5. Kurang tau juga :"
6. Kurang tau :"
7. Panjang pilar
= √2² + 2²
= √4 + 4
= √8
= 2√2
∠ ABC = 180° - 90° - 42°
= 48°
2) a . 2x + 3x = 90°
5x = 90°
x = 90°/5
x = 18°
b . ∠ LKM = 2x
= 2 . 18°
= 36°
c . ∠ LMK = 3x
= 3 . 18°
= 54°
4) Δ PQR siku siku di R
QR² = PQ² - PR²
= 17² - 8²
= 289 - 64
= 225
QR = √225
= 15 cm
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