tentukanlah keliling abcd diatas

Langsung aja y

AD = √13² - 5²
AD = √169 - 25
AD = √144
AD = 12 cm

AC = √12² + 2²
AC = √144 + 4
AC = √148
AC = 12,2 cm

Keliling
= AD + DB + BC + AC
= 2 + 5 + 13 + 12,2
= 32,2 cm

Semoga berguna +_+