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panjang diagonalnya 13
2) 4y-15 = y+6 => 4y-y = 6+15 => 3y = 21 => y = 7
panjang sisinya 7
5x-3x = 19+7
2x = 26
x = 26 : 2
X = 13
2. 4y-15 = y+6 AD= 4(7)-15= 28-15=13 AB= 7+6 = 13
4y-y = 15+6
3y = 21
y = 21:3
y = 7
Um, maksudnya diagonal apa?