jika keliling layang layang pqrs 70 cm panjang pr... cm

Keliling layang layang

= p + q + r + s

= 70 cm

Panjang PQ = PS

= 70 cm - [ 15 cm + 15 cm ]

= 70 cm - 30 cm

= 40 cm

= 40 cm : 2

= 20 cm

Panjang ST

[tex] \sqrt{15 {}^{2} - 9 {}^{2} } \\ \\ = \sqrt{225 - 81} \\ \\ = \sqrt{144} \\ \\ = 12 \: cm[/tex]

Panjang PT

[tex] \sqrt{20 {}^{2} - 12 {}^{2} } \\ \\ = \sqrt{400 - 144} \\ \\ = \sqrt{256} \\ \\ = 16 \: cm[/tex]


Panjang PR

= 16 cm + 9 cm

= 25 cm


Jadi panjang PR adalah 25 cm