Jawaban:
a. Panjang AE = √AD² - √DE² = √13² - √12² = √169 - √144 = √25 = 5 cm
b. Panjang CD = AE + BE = 20 cm
c. Panjang BC = AD = 13 cm
d. Besar sudut <DAB = (360° - (112°×2))/2 = (360° - 224°)/2 = 136°/2 = 68°
e. Besar sudut <ABC = 112°
f. Besar sudut <ADC = <ABC = 112°
g. Tinggi jajar genjang = DE = 12 cm
h. Keliling jajar genjang = (AD + AB) × 2 = (13 + 20) × 2 = 66 cm
i. Luas jajar genjang = AD × AB = 13 × 20 = 260 cm²
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Jawaban:
a. Panjang AE = √AD² - √DE² = √13² - √12² = √169 - √144 = √25 = 5 cm
b. Panjang CD = AE + BE = 20 cm
c. Panjang BC = AD = 13 cm
d. Besar sudut <DAB = (360° - (112°×2))/2 = (360° - 224°)/2 = 136°/2 = 68°
e. Besar sudut <ABC = 112°
f. Besar sudut <ADC = <ABC = 112°
g. Tinggi jajar genjang = DE = 12 cm
h. Keliling jajar genjang = (AD + AB) × 2 = (13 + 20) × 2 = 66 cm
i. Luas jajar genjang = AD × AB = 13 × 20 = 260 cm²