Math-7 QUIZ “Proportions” Fill-in-the-Blank: 1)A proportion can be described as two ______________________ ratios. Do the following ratios form proportions? (Answer “YES” or “NO”) 2) _14_, _7_3) _15_, _3_ Solve the following proportions for “x”: 4) _x_ = _3_5) _2.5_ = _5_ 12 4 x 12 Solve the following problems using a PROPORTION: 6)The ratio of red skittles to blue skittles is 3 : 5. If there are 27 red skittles, how many blue skittles are there? 7)There are 4 boys for every 7 girls in math class. If there are 14 girls in class, how many total students are there? 8) The ratio of dogs to cats is 3 : 5. If there are 27 dogs, how many cats are there? 9) The ratio of students to teachers is 8 : 1. If there are 104 students, how many total people (students and teachers) are there? 10) If four jars of pickles cost $8.40, how much is one jar of pickles? Name: Date:

Math-7 QUIZ “Proportions, Part 2” Name: __________________________________________________ Date: _____/_____/__________ 1.Jerry got an 85% on the test. If he answered 17 questions correctly, how many total questions were on the test? 2.Nick has a bag skittles. 20% of them are red. If there are 40 total skittles in the bag, how many are red? 3.While playing a song on Guitar Hero, you hit 260 notes correctly. If there was 320 total notes in the song, what percent did you hit correctly? 4.The scale on a certain map is 3 cm. = 25 mi. If two towns are 5 cm. apart on the map, how far apart are they in real life? 5.The scale on a set of blueprints is 1.5 in. = 8 ft. If a room is to be 10 ft. in length, what will its length be on the blueprint? 6.Leesburg is 40 miles away from Washington D.C. If the scale on the road map is 2 in. = 15 mi., how far apart are the two cities on the map? 7.The kitchen on a certain house plan is 5.5 cm long on the blueprint. If the scale on the blueprint is 1 cm. = 2 ft., how long will the kitchen be in real life? SCALE PROPORTIONS: PERCENT PROPORTIONS:

8. Triangle ABC is similar to Triangle DEF: Which of the following is true? A.Side AB corresponds to FD. B.Side AC corresponds to EF. C.Side AB corresponds to DE. D. Side BC corresponds to DF. 9. Triangle ABC is similar to Triangle DEF: 10. The following two rectangles are similar. Solve for the missing side- length. (Show work here) Which of the following statements about similar figures is true? A.Corresponding sides are congruent. B.Corresponding angles are similar. C. Corresponding sides are in proportion & corresponding angles are congruent. D.Corresponding sides are congruent & corresponding angles are in proportion. 12. A 30 ft. tall building casts a shadow 40 ft. in length. A nearby tree casts a shadow 16 ft. in length. How tall is the tree? (Sketch picture to help you) (Show work here)... SIMILAR FIGURE PROPORTIONS: A B C D E F A B C D E F 2 in. 3 in. 12 in. x