Question

Bantu ngerjain dong , makasih:)

Answer 1

2.) L∆ = 1/2.a.t
L∆ = 135
135 = 1/2.a.15
a = 135/ 1/2.15
a = 9. 2/1
a = 18
a = sisi persegi
L. persegi = s×s
L. persegi = 18×18 = 324
Luas permukaan limas = (4xL∆)+L.prsegi
= (4×135)+324
= 540 + 324
= 854

4.) t.1/2. sisi persegi (1/2 alas∆):
=√17^2 - 15^2
= √289 - 225
= √64
= 8
t.sisi prsegi (alas∆) = 8.2 = 16
L.segitiga = 1/2.a.t
= 1/2.16.17
= 8.17
= 136
L.persegi = sisixsisi
= 16x16
= 256
L.permukaan limas = (4×L∆)+L.prsegi
= (4×136)+256
= 544 + 256
= 800

5.) L∆ = 1/2.a.t
= 1/2.8.8
= 4.8
= 32