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Definition
Word
Fill-in-the-blanks
Formulas
Quiz Time
100
a segment from the center of a circle to any point on the circle
What is radius?
100
circle
What is the set of all points on a plane at a set distance from a given point?
100
tangent to a circle= A line that lies in the plane of a circle and that intersects the circle at exactly _____ point?
one
100

2╥r

What is the formula for circumference?

100
If the diameter is 6 then the circumference is 12. A.False B.True
B.true
200
a chord that contains the cecnter of the circle
What is diameter?
200
central angle
What is an angle whose vertex is the center of the cirlce?
200

What special right triangle has labels of x, x and x*sqrt(2)

45-45-90

200

╥r^2

What is the formula of the area of a circle?

200
Find the circumference of a circle with a radius of 10m. A.6.28m B.62.8m C.628m D.6280m
B.62.8m
300

an angle whose vertex is on the edge of the circle

What is inscribed angle?

300
semicircle
What is an arc of a cricle whose endpoints are endpoints of the diameter?
300

secant= A line that contains touches at ____ points on a circle

two

300
a^2+b^2=c^2
What is the formula for Pythagorean theorem?
300

The radius of a circle is 8 centimeters (cm) and has a central angle of 50 degrees. What is the arc length?  A.16 cm B.7 cm C.50 cm D.28 cm

B. 7 cm

400

The trig function that works with the opposite and adjacent side

tangent/tan

400
minor arc
What is an arc of a circle whose length is less then the length of half the circle?
400
circumference= the _______ of a circle?
perimeter
400

Angle = (big arc - small arc)/2

Vertex outside

400
A merry-go-round has a diameter of 25 feet. What is the approximate circumference of the merry-go-round? A.78.5 ft B.157 ft C.235.5 ft D.314 ft
A.78.5 ft
500
an arc of a circle whose length is more than the length of half the cirlce
What is major arc?
500
point of tangency
What is the point where a circle and a tangent intersect?
500

A segment whose endpoints lie on the circle?

chord

500

2╥r *(theta/360)

What is the formula for arc length?

500

At the railroad crossing, Mike noticed the crossing sign. He and his friends discovered that the circumference was 69.08 inches. What was the diamter of the sign? A. 11 inches B. 21 inches C. 22 inches D. 23 inches

C. 22 inches