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< ADC = 2 x < ADO = 2 X 32 = 64 derajat
< BAD = 180 - 41-32 = 107 derajat
b. luas layang layang = ½ x diagonal (d) 1 x diagonal (d) 2
= 1/2 x 7 x 9,6
= ½ x 67,2
= 33,6cm
<ADC= 32 + 32 = 64
<BAD= <BAC + <DAC
<BAC= 180 - (90+41) = 49
<DAC= 180 - (90+32) = 58
Jadi, <BAD= 49+58 = 107
b) Luas Layang-layang = 1/2 x d1 x d2
= 1/2 x 9,6 x 7
= 33,6
5. a) (14-6) : 2
8 : 2 = 4
Tinggi Trapesium = Triple phytagoras =3, 4, 5
Tinggi Trapesium = 3 cm
b) Luas Trapesium = 1/2 x jml sisi sejajar x t
= 1/2 x 20 x 3
= 30 cm²