Angle Relationships
Any angle larger than 90 degrees but smaller than 180
obtuse angle
What do we can any shape with three sides?
triangle
A triangle with all angles less than 90 degrees is called
acute triangle
What transformation is a slide?
Translation
Any angle exactly 90 degrees
right angle
What do we call any shape with four sides?
quadrilateral
A triangle with one angle larger than 90 degrees is called
obtuse triangle
What transformation mirrors a shape?
reflection
Any angle less than 90 degrees
acute angle
How many degrees are in a pentagon?
540
How many right angles are there in a right triangle?
one
What transformation turns a figure around a point?
rotation
Two angles that add up to 90 degrees
complementary angles
What is the name of a polygon with ten sides?
Decagon
If a triangle has all side lengths different and less than 90 degrees, what are the two classifications?
scalene and acute
What transformation scales a shape larger or smaller?
dilation
two angles that add up to 180
supplementary angles
What is the official formula for degrees in a polygon?
S=(n-2)*180
Could a straight angle triangle exist? Explain.
No, because a straight angle has 180 degrees which is the same as the total degrees in a triangle. This would leave zero degrees for the other two angles, making the "triangle" not a triangle.
If a shape starts out in the upper left quadrant and reflects over the y axis, what quadrant will it end up in?
Upper right/Quadrant I