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Distance
Midpoint
Area
Perimeter
Riddles
100

The formula used to find the length of a line segment in a coordinate plane.

sqrt((x_1-x_2)^2+(y_1-y_2)^2)




100

The formula used to find the middle of a segment on a coordinate plane.

((x_1+x_2)/2,(y_1+y_2)/2)



100

The formula for area of a triangle.

(bxxh)/2

100

The perimeter of the polygon defined by the points A(12, 20), B(20, 20), C(20, 8), and D(12, 8)

What is 40 units?

100

This goes up and down, but still remains in the same place.

What are stairs?

200

The length of a segment that passes through the points (5, 2) and (2, 6). Round to the nearest hundredth if necessary.

What is 5 units?

200

The midpoint of the segment whose endpoints (5, 9) and (3, 1).

What is (4, 5)?

200

The formula for area of a parallelogram.

bxxh

200

The perimeter of the rectangle defined by the points A (5,8), B (5, -1), C (12, -1), and D (12, 8).

What is 32 units?

200

This has a foot on the right and left and 1 in the middle.

What is a yardstick?

300

The length of a segment whose endpoints are (-3, 2) and (6, 8). Round to the nearest hundredth if necessary.

What is 10.81 units?

300

The midpoint of a segment whose endpoints are (-3, 5) and (-2, 7).

What is (-2.5, 6)?

300

the area of the polygon defined by the points A(12, 20), B(20, 20), C(20, 8), and D(12, 8)

96 units2

300

The perimeter of the polygon with coordinates H(-6, 1), I(4, 1), J(4, -8), K(-6, -8).

What is 38 units?

300
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it can neither see nor feel it.
What is a coffin?
400

The length of a segment whose endpoints are (-6, 7) and (-10, -4). Round to the nearest hundredth if necessary.

What is 11.70 units?

400

The endpoint of a segment whose midpoint is (5, 4) and one endpoint is (1, 3).

What is (9, 5)?

400

Square PQRS has vertices P (-3, 0), Q (0, 4), R (4, 1), and S (1, -3). Determine the area of the square.

 5 units2

400

Point A (1, 1) and point B (3, 5) are two vertices of an equilateral triangle. This is the perimeter of the triangle. Round your answer.

What is 13.42 units?

400
If it's information you seek, come and see me. If it's pairs of letters you need, I have consecutively three.
What is a bookkeeper?
500

The length of a segment whose endpoints are (2, 2) and (-2, 10) in simplified radical form.

What is 

4sqrt5

500

The endpoint of a segment whose midpoint is (-2, -3) and one endpoint is (-7, 3).

What is (3, -9)?

500

Triangle ABC has vertices at A(-2,1), B(-2,-3), and C(1,-2). What is the area of the triangle?

 6 units2

500

The perimeter of a regular pentagon with 2 consecutive vertices at (-1,2) and (3,-1).

What is 25 units?

500

What breaks at the mention of its name?

What is silence?