Symbols and Rules
Midpoint & Distance
Miscellaneous
100
What is the symbol that describes a triangle?
Δ
100
How could find the halfway point "midpoint" of a line on a coordinate plane, using the idea of averages?
100
What is the symbol that describes an angle?
∠
200
What is the symbol that describes a line segment (or a side)?
__
200
How could you use the Pythagorean Theorem to find out how long any line on a coordinate plane is?
200
In a triangle FGH: If line Segments FG and HG are the same, what can you tell about ∠H and ∠F?
They are equal. It's an isosceles triangle.
300
The sum of the measures of the angles of triangle is how many degrees?
180 degrees
300
Find Midpoint of (-4,4), (5,-1)
(0.5, 1.5)
300
Angles that are adjacent, the sum of which totals 180 degrees
Supplementary angles.
(Think of a gas or water supply line, which is usually a straight pipe.)
400
In a triangle XYZ: If ∠X = ∠Y, then what can you tell about line segments YZ and XZ?
The two sides are equal. It's an isosceles triangle. 
400
Find distance of (-2,3) and (-7,7).
6.403...
400
Angles that are adjacent, the sum of which totals 90 degrees
Complementary angles.
(A 90 degree angle is a right triangle. A gas or water pipeline doesn't make that sharp a turn, so you know it isn't supplementary.)
500
ΔABC is an isosceles triangle. Line segment AB = Line segment AC. If angle B is 75 degrees, what is angle A?
30 degrees
500
Find distance of (6,4) and (-5,-1).
12.083..
500
If DC measures 6 inches and BC is 4 inches, what's the area of the triangle?
12 square inches