Jawab:
3. Rumus luas seperempat lingkaran = x π x r²
= x x 7²
= x x 49
= 38,5 cm ( C )
4. Luas lingkaran - Luas persegi = Luas diarsir
( π . r² ) - ( s . s )
( . 7² ) - ( 5 . 5 )
( . 49 ) - 25
154 - 25 = 129 cm² ( D )
5. Budi : yono
25 : 20
5 : 4 ( D )
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Jawab:
3. Rumus luas seperempat lingkaran = x π x r²
= x x 7²
= x x 49
= 38,5 cm ( C )
4. Luas lingkaran - Luas persegi = Luas diarsir
( π . r² ) - ( s . s )
( . 7² ) - ( 5 . 5 )
( . 49 ) - 25
154 - 25 = 129 cm² ( D )
5. Budi : yono
25 : 20
5 : 4 ( D )