Jawabbb jawabbb donggg 2² nyaaa tengkyuu

Jawabbb jawabbb donggg 2² nyaaa tengkyuu

21.) diketahui :

PQ = 20 cm

QR = 13 cm

RS = 10 cm

Jawab:

$= sqrt{13^{2} - 5^{2} } \ = sqrt{169 - 25} \ = sqrt{144} \ = 12$

$= p times l \ =10 times 12 \ = 120 : cm \$

$= a times t \ = 10 times 12 div 2 \ = 60 : cm$

=120+ 60 = 180 cm^2

Jawabannya C