The measure of the sum of the interior angles of a regular n-sided polygon is (n - 2)180°. A regular octagon is shown below. What is the measure of the designated angle?
(A) 135°
(B) 144°
(C) 200°
(D) 225°
(E) 315°
In the figure below, 3 lines intersect at the indicated angles.
What is the degree measure of 
x?
（A）35° （B） 52.5° （C） 65° （D） 70° （E） 75°
Correct Answer: C
For the circle whose standard equation is (x - 1)2 + (y + 2)2 = 8, the center and radius are:
（A）center = (-1, 2); radius = 2
.
（B） center = (-1, 2); radius = 4.
（C） center = (0, 0); radius = 4.
（D） center = (1, -2); radius = 2.
（E） center = (1, -2); radius = 4.
Correct Answer: D
What is the solution set for the equation |-x| = x?
（A）All real numbers （B） x ≥ 0 （C） x ≤ 0 （D） Only x = 0 （E） Only x = -1
Correct Answer: B
More ACT Math Exam Questions
- 1
A thin slice is cut from a bagel, creating the cross-section represented below. The diameter of the bagel is 144 mm and the width from the inner edge of the bagel to the outer edge is uniformly 56 mm. Which of the following is closest to the area, in square millimeters, of the shaded empty space inside the cross-section of the bagel?
- 2
What is the perimeter of quadrilateral STUR if it has vertices with (x,y) coordinates S(0,0), T(2,-4), U(6,-6), R(4,-2) ?
- 3
What is the degree measure of an angle that measures
radians? - 4The town of Ashville has three bus stations (A, B, and C) that offer
round-trip fares to its business district at both peak and off-peak
rates. The matrices below show the average weekly sales for each station
at each rate and the costs for both rates. In an average week, what are
the combined peak and off-peak sales for Ashville's three bus stations?
- 5A science tutor charges $60 an hour to help students with biology homework. She also charges a flat fee of $40 to cover her transportation costs. How many hours of tutoring are included in a session that costs $220?