PLEASE HELP ME :) jangan asal² ​

Jawaban:

A. 10 cm dan 25 cm

Penjelasan dengan langkah-langkah:

PQ : RS = 2 : 5

K layang-layang = 70 cm

PQ = ?

RS = ?

Misalkan :

PQ = 2x

RS = 5x

K layang-layang = 2 × (PQ + RS)

70 cm = 2 × (2x + 5x)

70 cm = 2 × 7x

70 cm = 14x

x = 70 cm ÷ 14

x = 5 cm

PQ = 2x

PQ = 2 × 5 cm

PQ = 10 cm

RS = 5x

RS = 5 × 5 cm

RS = 25 cm