Chords
Sector area
Inscribed and central angles
Circle equations
Tutor lives before/after Match
100

Write these three things: which is a chord, which is a radius, and which is a diameter?

Show your tutor! 

Radii=OA', OB, OC, OA

Diameter = AA'

Chord = AB, AC

100

radius is 9 cm. What is the area of each piece?

27 cm2

100

Find x.

18°

100

What is the equation of this circle?

a) 2x2 + 2(y-3)2 = 18

b) (x-3)2 + y2 = 9

c) x2 + (y+3)2 = 9

d) x2 + (y-3)2 = 3

a)2x2 + 2(y-3)2 = 18.

Divide everything by 2, and you're left with 

x2 + (y-3)2 = 9.

100

This tutor worked at a perfume shop in Paris.

Mr. Wedgeworth

200

What is the length of chord YX?

29 units.

200

Find the area of the big sector. 

~317 cm2

200

What is the measure of arc XY?

What is 142°

200

This circle gets dilated by a scale factor of 2, anchored at the center of the circle. what is the new equation?

(x-4)2 + (y+3) = 16

200

This tutor shook Hillary Clinton's hand and lived to talk about it.

Ms. Rooks

300

Bobby says x=4. Is he right?

NOPE. Bobby took an L. 

x = 3 (points to whoever can explain)

300

How many times bigger is the right sector area than the left one?

4 times.

300

For this one, actually find arc NL.

D—156°

300

A circle has the equation (x+3)2 + (y+6)2 = 10.

What are the coordinates of one y intercept?

(0,-5) and (0,-7)

Plug in 0 for x: (3)2 + (y+6)2 = 10.

                      -9                      -9

(y+6)2 =1

y+6 = 1        AND         y+6= -1

300

This tutor is supporting the Warriors, who represent where they're going for law school.

Mr. Brice

400

What is x?

3.5

400

Given the sector area is 271.23 cm2 and the sector angle is 46°, find the radius.

26 cm.

400

Find arc measure LMN.

112°

400

This triangle is circumscribed by a circle, and Angle FKC is 90°. What are the coordinates of the center?

(-2.5, 5)

400

This tutor will be saving deer this Summer with the Colorado Parks and Rec department. 

Mr. Rawlinson

500


~17.7°

500
John took a slice of pepperoni with an inscribed angle of 60° from a pizza with radius 8 cm.


Lazarus took a slice of cheese with a central angle of 140° from a pizza with radius 6 cm. 

Who got more pizza?

John got more pizza!

500

Angle AOB is 110°. Find Angle ADB.

125°

500

This circle is shifted "wumbo" units to the right so that it crosses the x-axis at the origin. What is the new equation of the circle?

(x-6)2 + y2 = 36

500

This tutor is the biggest Kansas University fan but is actually going to Washington University in St. Louis. 

Ms. Miller

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