A polyhedron has 9 faces and 21 edges. How many vertices does it have?
The subject is maths

Complete the following sentence: wir den rasen a. gehen b. mähen c. besuchen ** d. haben complete the following sentence: sie nicht gern rad. a. fahrt b. kommt c. sieht d. fährt ** ** = my answer don't use google translate, i really need on checking these. you so much

Fill in the missing demonstrative article. ich kaufe pfred a. dieser b. diese c. dieses d. diesen

Fill in the text with the appropriate words.