Circle Vocab
Area & Perimeter
Solving Equations
Circle Vocab Part II
Right Triangle Relationships
100
A line segment with endpoints on the circle that passes straight through the exact center.
What is a diameter?
100
The formula used to find the area of a rectangle.
What is length times width (or base times height)?
100
The value of $x$ in the equation x + 15 = 25.
What is x= 10?
100
A line segment that connects the center of the circle to any point on its outer edge.
What is a radius?
100
The famous formula used to find missing side lengths in a right triangle.
What is a2 + b2 = c2?
200
A line outside the circle that intersects the edge at exactly one single point.
What is a tangent?
200
The perimeter of a triangle with sides measuring 5 cm, 7 cm, and 10 cm.
What is 22 cm?
200
The value of y in the equation 3y = 21
What is y = 7?
200
A line segment whose two endpoints both lie on the edge of the circle, but it does not have to pass through the center.
What is a chord?
200
The popular 9-letter acronym used to remember the three main trigonometric ratios.
What is SOH CAH TOA?
300
An angle whose vertex is located exactly on the outer edge of the circle.
What is an inscribed angle?
300
The area of a triangle with a base of 8 inches and a height of 6 inches.
What is 24 square inches?
300
The value of x in the equation 2x - 5 = 11.
What is x = 8?
300
A continuous portion of the circle's outer edge that measures less than 180 degrees and is named using exactly two letters.
What is a minor arc?
300
The length of the hypotenuse if the two legs of a right triangle measure 3 and 4.
What is 5?
400
An arc that measures more than 180 degrees and requires three letters to name it.
What is a major arc?
400
The exact circumference of a circle with a diameter of 10 feet.
What is 10π feet?
400
The solution for x in the equation 4(x + 2) = 24
What is x = 4?
400
An angle whose vertex is located exactly at the center point of the circle.
What is a central angle?
400
If the opposite side of a right triangle is 4 and the adjacent side is 3, this is the tangent ratio written as a fraction.
Tan= 4/3
500
A continuous line that intersects a circle at exactly two points and extends infinitely outside the circle.
What is a secant?
500
Clue: The exact area of a circle with a diameter of 12 meters.
What is 36π square meters?
500
The value of x when 5x - 3 = 2x + 12.
What is x = 5?
500
The specific curved section of a circle's edge that is enclosed inside the opening of a central or inscribed angle.
What is an intercepted arc?
500
The specific calculator function you must use to find a missing angle measure if you already know the side lengths.
What is an inverse trigonometric function (or inverse sine/cosine/tangent)?