" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
______ Jawaban ______L = 90/360 × phi × r²
1/4 × 3,14 × r² = 78,5 cm²
r² = 78,5 ÷ 3,14 ÷ 1/4
r² = 25 × 4/1
r² = 100
r = √100
r = 10 cm
_____ Selamat Belajar _____