Question

Tlng jwab no 21,22,23,24,pakai cra

Answer 1

21)mencari diagonal 2
d2=√17²-√15²
=√64
=8cm

jadi diagonal dua=8x2=16cm
luas diagonal=(30cmx16cm):2=240cm²
22) 2(2x-3+x+1)=4(x+3)
2(3x-2)=4x+12
6x-4=4x+12
2x=16
x=8

sisi persegi=x+3=8+3=11cm
23)Sudut P=2/5x180°=72°
Sudut Q=3/5x189°=108°