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Kelas 8 Matematika
Bab Bangun Datar

FB = √(BC² - FC²)
FB = √(25² - 15²)
FB = √(625 - 225)
FB = √400
FB = 20 cm

EA = √(FB² - (AB - EF)²)
EA = √(20² - (26 - 14)²)
EA = √(400 - 144)
EA = √256
EA = 16 cm

Keliling = AB + BC + CD + DE + EA
Keliling = 26 + 25 + 14 + 15 + 16
Keliling = 96 cm