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karena sama kaki maka panjang a=t annggap saja p
LΔ = pxp/2
98 = p²/2
98x2 = p²
196 = p²
√196 = p
14 = p
sisi miring² = alas²+tinggi²
SM² = 14²+14²
SM² = 196+196
SM² = 392
SM =√392
SM = 14√2
jd panjang sisi segitiga tersebut 14 cm , 14 cm dan 14√2 cm