Tolong dibantu kakak
Wa² = WZ² - ( ½ ( WX - YZ) )
Wa² = 10² - ( ½ ( 19 - 7 ) )²
Wa² = 100 - ( ½ . 12 )²
Wa² = 100 - 6²
Wa² = 100 - 36
Wa² = 64
Wa = 8
Luas Trapesium
= ½ × ( WX + YZ ) × Wa
= ½ ( 7 + 19 ) × 8
= ½ × 26 × 8
= 26 × 4
= 104
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