1. perímetro   circumference   perimeter   cylinder   area   Hint Half-n-half Clue   2. superfície, área   area   point   cube   cone   Half-n-half Clue   3. retângulo   rectangle   cube   perimeter   circle   Half-n-half Clue   4. cilindro   cylinder   volume   triangle   circle   Half-n-half Clue   5. triângulo   line   triangle   volume   curve   Half-n-half Clue   6. círculo   radius   circle   line   square   Half-n-half Clue   7. cone   semicircle   cone   circle   area   Half-n-half Clue