Jawapan

2016-08-10T21:00:36+08:00
Trapezium RSTU =48 cm²
:1/2 x (9+7) x height =48
: 1/2 x 16 x h =48
: 8 x h =48
: h=48÷8
: h =6 cm ( panjang UT)

luas trapezium PQTU =
: 1/2 x [ (12+7)+(12+9) ] x 6 =
: 1/2 x ( 19+21) x 6
: 1/2 x 40 x6
=120 cm²

panjang RS:
make a triangle at Rs
: (9-7)
:2

Theorems Phytaghoras :
- Rs² = 6²+ 2²
Rs = √40
Rs = 6.32 cm
2016-08-10T21:04:27+08:00
Panjang UT ialah 6cm
Guna formula Luas Trapezium :D