1. cent, centi : hundred dec, deca : ten centennial (adj.) an event that occurs every 100 years; a 100 th anniversary syn. – celebration since today marks the centennial of my great grandmother we are going to throw her a party said uncle mark centimeter (n.) a unit of length in the metric system; it takes 100 to equal 1 meter this board stated the carpenter is twelve centimeters long twelve centimeters wide and weighs fifteen pounds

2. centipede (n.) an arthropod with perhaps 100 legs if we put this centipede on my sister whispered john she will go nuts she hates bugs century (n.) a period of 100 years i cant believe that one hundred years ago on january 5 1914 that minimum wage was only five dollars exclaimed my grandmother cent, centi : hundred dec, deca : ten

3. decade (n.) a period of ten years ten years ago in 2004 facebook was launched the summer olympics took place in athens greece and the boston red sox won the world series decagon (n) a polygon with ten sides and ten angles this shape stated mrs roan is a decagon lets add all of its sides together cent, centi : hundred dec, deca : ten

4. cent, centi : hundred dec, deca : ten decathlon (n.) an athletic contest consisting of ten different events robert had been training every day for the decathlon by swimming biking watelifting running hiking eating healthy food resting skiing jumping and paddling decimal (n.) a number using the base of ten; a part of a whole based on groups of ten when figuring out percentages stated mrs roan you have to move the decimal point

5. penta: five oct: eight sol, soli: one, only, alone pentagon (n.) a polygon with five sides and give angles mr smith explained this shape is an pentagon it only has five sides pentathlon (n.) an athletic contest consisting of five different events ive been training for my next pentathlon by running biking hiking swimming and biking stated john

6. penta: five oct: eight sol, soli: one, only, alone octagon (n.) a shape with eight sides and eight angles do you see that stop sign questioned my mom it is the shape of an octagon octave (n.) a group or series of eight; in music, a tone eight degrees higher or lower than another tone in the middle of the music their is an example of an octave and I want you to find it stated mrs sanford

7. penta: five oct: eight sol, soli: one, only, alone octet (n.) a group of eight; eight musicians i wanted to try out for the octet group at school but my singing voice was not adequate octopus (n.) a mollusk with eight tentacles mrs hopkins brought an octopus to class it was so slimy and gross I loved it exclaimed nick

8. penta: five oct: eight sol, soli: one, only, alone solitaire (n.) a card game played by one person meghan spends hours a day playing solitaire and other card games she has became very skilled solitude (n.) isolation; seclusion; the state of being alone gary his mother called why do you spend everyday alone in your room dont you get tired of solitude