Question

Tolong bantu yah ......

Answer 1

Gunakan rumus sudut bagi segitiga.
a.
y/9 = 12/(11 + 9)
y/9 = 12/20
y = 9 x 12/20
y = 5,4

x/11 = 12/(11+9)
x/11 = 12/20
x = 11 x 12/20
x = 6,6

z² = (9 x 11) - (5,4 x 6,6)
z² = 99 - 35,64
z² = 63,36
z = √63,36


b.
a/20 = 22/(20 + 24)
a/20 = 22/44
a/20 = 1/2
a = 1 x 20/2
a = 10

b/24 = 22/(20 + 24)
b/24 = 22/44
b/24 = 1/2
b = 1 x 24/2
b = 12

c² = (20 x 24) - (10 x 12)
c² = 480 - 120
c² = 360
c = √360 = 6√10