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100° + 2 x = 180°
100° + 2x -(100°) = 180° - (100°)
2x = 80°
x = 40°
QPS = 2x
QPS = 80°
Q = 3x - 5
Q = 3(40°) - 5
Q = 120° - 5
Q = 115°
Q + R = 180° (sepihak)
115° + (y + 15) = 180°
130° + y = 180°
y = 50°
QRS = y + 15°
QRS = 50° + 15°
QRS = 65°
4. ABC = 41° + 41°
ABC = 82°
ADC = 32° + 32°
ADC = 64°
SEGITIGA BAD
<ABD + <ADB + < BAD = 180° (sudut segitiga)
41° + 32° + < BAD = 180°
<BAD = 107°
d₁ = 5,6 cm + 4 cm
d₁ = 9,6 cm
d₂ = 3,5 cm + 3,5 cm
d₂ = 7 cm
L = 1/2 * d₁ * d₂
L = 1/2 * 9,6 cm * 7 cm
L = 33,6 cm²
5. t = (14-6)/2
t = 8/2
t = 4 cm
L = (a + b)t /2
L = (6 cm + 14 cm)4cm / 2
L = (20cm)4cm / 2
L = 80 cm / 2
L = 40 cm²