ekamiaww
12b) t² = 25² - 7² t² = 625 - 49 t² = 576 t = 24 cm misal, pjg diagonal alas = d, sisi alas = a d = a√2 14 = a√2 a = 14 / √2 cm luas alas = a x a = 14/√2 x 14/√2 = 196/2 = 98 cm² volume limas = 1/3 x luas alas x tinggi = 1/3 x 98 x 24 = 784 cm³
BE = 1/2 x BC = 1/2 x 10 = 5 cm
a) TE = akar dr TB² - BE²
= akar dr 13² - 5²
= akar dr 169 - 25
TE = √144 = 12 cm
b) Lp. limas = L alas + jumlah L sisi tegak
= s² + 4.1/2.a.t
= 10² + 4.1/2.10.13
= 100 + 260
= 360 cm²
maaf it dl aj y.
t² = 625 - 49
t² = 576
t = 24 cm
misal, pjg diagonal alas = d, sisi alas = a
d = a√2
14 = a√2
a = 14 / √2 cm
luas alas = a x a
= 14/√2 x 14/√2
= 196/2
= 98 cm²
volume limas = 1/3 x luas alas x tinggi
= 1/3 x 98 x 24
= 784 cm³
semoga membantu ya :)