sat冲刺3.ppt

1、SAT,Scholastic Assessment Test 学术能力评估测试,（1）Each of the small squares in the figure above has an area of 4. If the shortest side of the triangle is equal in length to 2 sides of a small square, what is the area of the shaded triangle? A. 160 B. 40 C. 24 D. 20 E. 16,1.Geometry and measurement,The area

2、 of rectangle ABCD is 96, and AD=2/3(AB). Points X and Y are midpoints of AD and BC, respectively. If the 4 shaded triangles are isosceles, what is the perimeter of the unshaded hexagon? A. 16 B.8+6,C. 24 D. 8+16,E. 16+24,1.Geometry and measurement,The figure above shows an arrangement of 10 squares

3、, each with side of length k inches. The perimeter of the figure is p inches. The area of the figure is a square inches. If p=a, what is the value of k?,1.Geometry and measurement,1.Geometry and measurement,If a triangle ABC has AB=7 and BC=7, then the difference between the greatest and least possi

4、ble integer values of AC is A. 11 B. 12 C. 13 D. 14 E. 15,1.Geometry and measurement,In a triangle PQR, the length of side QR is 12 and the length of side PR is 20. What is the greatest possible integer length of side PQ? A. 9 B. 16 C. 25 D. 27 E. 31,1.Geometry and measurement,In the figure above, a

5、rc SBT is one quarter of a circle with center R and radius 6. If the length plus the width of rectangle ABCR is 8, then the perimeter of the shaded region is A. 8+3 B. 10+3 C. 14+ 3 D. 1+6 E. 12+6,1.Geometry and measurement,In the figure above, QR is the arc of a circle with center P. If the length

6、of the arc QR is 6,what is the area of sector PQR? A. 108 B. 72 C. 54 D. 36 E. 9,The figure above consists of two circles that have the same center. If the shaded area is 64 square inches and the smaller circle has a radius of 6 inches, what is the radius, in inches, of the larger circle?,1.Geometry

7、 and measurement,In a certain machine, a gear makes 12 revolutions per minute. If the circumference of the gear is 3 inches, approximately how many feet will the gear turn in an hour? A. 6782 B. 565 C. 113 D. 108 E. 9,1.Geometry and measurement,Tom and Alison are both salespeople. Toms weekly compen

8、sation consists of $300 plus 20 percent of his sale. Alisons weekly compensation consists of $200 plus 25 percent of her sales. If they both had the same amount of sales and the same compensation for a particular week, what was that compensation, in dollars? (Disregard dollar sign when gridding your

9、 answer),2.Problems,To celebrate a colleagues graduation, the m coworkers in an office agreed to contribute equally to a catered lunch that costs a total of y dollars. If p of the coworkers fail to contribute, which of the following represents the additional amount, in dollars, that each of the remaining coworkers must contribute to pay for the lunch?,2.Problems,In a certain store, the regular price of a refrigerator is $600. How much money is saved by buying this refrigerator at 20 percent off the regular price rather than buying it on