" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
= 18
garis tinggi segitiga = √12²+9²
= √144+81
= 15
L segitiga = 1/2. 18. 15
= 135
L permukaan = L persegi + 4.L segitiga
= 18² + 4.135
= 324 + 540
= 864 cm²