Test 6 #20 from the no calculator section

Can you please explain College Board Test 5 Section 4 #36?

I understand that angle A is half of x- the only part of the college board explanation I’m not understanding is why we do (360-x) while setting up the equation. Thanks!

I couldn’t find the new tests on the spreadsheet. Could you do SAT test 5, section 4, problem 29 please?

In the picture, Lines L1 and L2 are parallel, Lines L3 and L4 are parallel, L1 and L3 intersect on the circle, and L2 passes through the center of the circle. The angle theta equals pi/3, and radius R = 6. Find the area of the region A, which lies outside the circle and is bounded within the three line segments. Round your answer to the nearest hundredth. The answer is 29.72. Help!!

Test 2 Section 4 #36

The new SAT requires you to know a number of special equation forms—to know which one you need to use in a given situation, and to know how to get into that form if it’s not the one you’re given by using algebraic manipulation. Some equation forms (vertex form of a parabola and the standard (more…)

Test 1 Sec4 #24 help!

The figure above shows part of a circle whose circumference is 45. If arcs of length 2 and length b continue to alternate around the entire circle so that there are 18 arcs of each length, what is the degree measure of each of the arcs of length b?

a) 4

b) 6

c) 10

d) 16

e) 20

What is the area of the largest circle that can be inscribed in a semicircular region of radius r?

A) pir^2/4

B) pir^2/3

C) pir^2/2

D) 2/3 pi r^2

E) 3/4pir^2

I don’t understand why the circle inscribed radius is half the semicircular ones?

Gear A has 72 teeth and gear B has 48 teeth. How many complete revolutions does gear A make when gear B makes 9 complete revolutions?

In the figure above, line l is tangent to the circle at point P, and O is the center of the circle. What is the value of y?

A)50

B)55

C)60

D)65

E)75

A square with an area of 2 is inscribed in a circle. what is the area of the circle?

A) pie

B) Pie^2

C) 2pie

D) 2 radical pie

E) 4pie

In the xy plane the point (3,0) is the center of a circle that has a radius of 3. Which of the following is not a point on the circle?

A) (6,0)

B) (6, -3)

C) (3,3)

D) (3,-3)

E) (0,0)

In figure 5, rectangle ABCD is inscribed in a circle. If the radius of the circle is 1 and AB = 1, what is the area of the shaded region?

A) 0.091

B) 0.285

C) 0.614

D) 0.705

E) 0.732

In a circle, AB and CD are diameters. Which of the following must be true?

I. The length of arc ABD is equal to the length of arc BAC

II. AB is perpendicular to CD

III. ACBD is a square