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Verified answer
Luas SQR = 1/2 . a . t= 1/2 . 20 . t
= 10 t
Luas SQR = 125
maka
10 t =125
t = 125 / 10
t = 12,5
Luas SPR = 1/2 . a . t
= 1/2 . 5 . 12,5
= 31,25 satuan luas
Verified answer
Mapel : MatematikaKelas : VII SMP
Bab : Geometri Segitiga
Pembahasan :
Luas SQR = 1/2 SQ . SR
125 = 1/2 . (15 + 5). SR
250 = 20SR
SR = 250/20
SR = 25/2
SR = 12,5 cm
Luas PSR = 1/2 . PS . SR
Luas PSR = 1/2 . 5 . 12,5
Luas PSR = 31,25 cm²