单选题 In the following figure, what is the sum of the degree measures of the marked angles?
120
180
360
540
It cannot be determined from the information given.
单选题 In the figure above, OACB is a square with area 4×2. If OA and OB are radii of a sector of a circle O, what is the perimeter, in terms of x, of the unbroken figure?
x(4+3π)
x(3+4π)
x(6+4π)
4(x+2π)
7πx
单选题 If the measures of the angles of a triangle are in the ratio of 2:3:4, what is the measure of the smallest angle of the triangle?
20
25
30
40
45
单选题 what is the perimeter of a triangle in the x y-coordinate plane whose vertices are the points(5. 8) (5. 2).and (9. 8)?
6
10
单选题 In quadrilateral ABCD, ∠A+∠C is 2 times ∠B+∠D. If ∠A=70, then ∠B= ______.
60
80
120
240
It cannot be determined from the information given
单选题 Two circles, P and Q, lie in the same plane. If the center of circle Q lies on circle P, then in how many points could circle P and circle Q intersect? Ⅰ. 0 Ⅱ. 1 Ⅲ. 2
Ⅰ only
Ⅱ only
Ⅲ only
Ⅰ, Ⅱ and Ⅲ
Ⅱ and Ⅲ only
单选题 The price of a stock falls 25%. By what percent of the new price must the stock price rise in order to reach its original value?
25%
30%
40%
75%
单选题 Part of the graph of the function f(x) is below. If f(x) = f (-x), f(1. 5)= ______.
1
1. 5
2
2. 5
3
单选题 What is the area of a square with a diagonal of ?
1/2
1
2
4
单选题 If 3/4 = 6/x = 9/y, then x + y= ______.
4
8
12
16
20