MATH 421A JEOPARDY!

Circle Geometry

100

Two inscribed angles, subtended by the same arc must be...

equal/congruent

200

The central angle is 62^o. The inscribed angle formed by the same arc must be...

31^o

300

The chord that is divided into two equal halves by the radius/diameter, also forming a right angle...

Perpendicular bisector

400

A line that intersects with the circle at exactly one point, forming a right angle with the radius/diameter...

Tangent line

500

True or false:

There are three points on the circumference of a circle, A, B, and C. If AB forms the diameter of the circle, then it is impossible to form a triangle in which angle C is not 90^o.

True

Angle C will always be an inscribed angle subtended by the same arc as the diameter; 90^o

Polynomials and Algebra

100

The line y = mx + b, where x, y are variables and m, b are constants has a degree of...

1

200

True or false: x^-1 + y^1.5 is not a polynomial expression.

True

300

When two or more terms differ only in terms of their numerical coefficients, what are they referred to as?

Like terms

400

Simplify:

-x² + 5xy - 5x² + (3x)(6y) + 2y² - y²

y² + 23xy - 6x²

500

If -x/5 = x - 25, then what is x?

x = 125/6

Measurement and Geometry

100

When four equilateral triangles are places together, the resulting 3D solid is called...

A tetrahedron

200

Given 12 feet, what is this in meters?

3.6 meters

300

A right pyramid with base measurements 4 cm by 4 cm and a slant height of 7 cm will have a lateral area of...

56 cm²

400

A rectangular prism has a volume of 273 cm³. Suppose that there is a right pyramid with the same base area and height of the rectangular prism. What is the pyramid's volume?

91 cm³

500

If the diameter of a sphere is 10 cm, then the surface area as an exact value will be...

100𝜋

Symmetry and Surface Area

100

An isosceles triangle has how many lines of symmetry?

1 line of symmetry

200

What is the order of rotation of an equilateral triangle?

3

300

If the surface area of a cube is 216 cm², then what is its side length?

s = 6 cm

400

How many oblique lines of symmetry does a square have?

2 oblique lines of symmetry

500

An octagon is rotated about its central point. What is the angle of rotation?

45^o

Numbers

100

Which of the following is not an integer?

-1, 0, 100, 1/2

1/2

It is a rational number, but not an integer

200

Which of the following is not a rational number?

-1, √2, 5.3, 0.01

√2

300

This two digit perfect square is also a perfect cube. What is this number?

64

8 x 8 = 8² = 64

4 x 4 x 4 = 4³ = 64

400

This extremely large number has an Internet search engine named after it.

What is a googol? 10¹⁰⁰

Internet: Google.com

500

The product between the square root of 81 and 2 cubed is equal to...

9 x 8 = 72