a ray that cuts the angle exactly in half, making two equal angles.
What is an angle bisector
100
the plural word for radius
What is radii
200
all angles are more than 90 degrees
What is an obtuse triangle
200
two angles whose sum is 90 degrees
What are complementary angles
200
how many sides does an octagon have
What is 8
200
a line segment connecting a vertex to the line containing the opposite side and perpendicular to that side.
What is altitude
200
True or False
was math founded on geometry
True
300
there is at least one right angle within the triangle
What is a right triangle
300
two angles whose sum is 180 degrees
What are supplementary angles
300
how many sides does a trapezoid have
What is 4
300
the point where the three angle bisectors meet. This point is the same distance from each of the three sides of the triangle.
What is the incenter
300
standard form
What is Ax+By=C
400
what is the Pythagorean theorem?
What is a^2+b^2=c^2
400
angles that occupy corresponding positions when a line intersects two other lines
What are corresponding angles
400
how many sides does a nonagon have
What is 9
400
the point where the three altitudes meet, making them concurrent.
What is the orthocenter
400
what is the formula for area of a parallelogram
What is A=bh
500
all triangles have a total angle of how many degrees?
What is 180
500
angles that share a common side and vortex
What are adjacent angles
500
how many sides does a heptagon have
What is 7
500
can be used to describe a translation. It is drawn as an arrow. The arrowhead points in the direction of the translation, and the length of the vector tells you the length of the translation.