Triangles
formulas
imagine that
Move It!
Line it Up
100
How many degrees are in a triangle?
180
100
The area of a triangle
1/2*base*height
100
angles on a straight line add up to
180°
100
What kind of transformation flips a figure over a line?
What is a reflection?
100
Parallel lines have this.
What is the same slope?
200
90
200
area is defined by length times width for this shape
Rectangle
200
What does pi represent?
The ratio of circumference by diameter
200
What are the coordinates for a point (3, -5) that has rotated 90 clockwise?
(-5, -3)
200
When parallel lines are intersected by a transversal these angles are supplementary.
What are same side interior angles?
300
The sum of the three interior angles of a triangle
180°
300
The area is defined by multiplying one side by another
Square
300
a line segment having an angle of 360°
Circle
300
What is a rigid motion that turns a figure about a fixed point.
A rotation
300
Vertical angles are always what?
Congruent
400
True or false: Supplementary angles always add up to 180
True
400
My area is determined by multiplying pi times radius squared
circle
400
Perpendicular lines have this.
What are slopes that are opposite reciprocals?
400
How can you reduce the size of a preimage?
Dilate it by a fraction or number between 0 and 1
400
When parallel lines are intersected by a transversal, these angles are congruent?
What are alternate interior, alternate exterior and corresponding angles?
500
a triangle with one interior angle measuring more than 90°.
Obtuse triangle
500
150
500
4 triangles, 3 meeting at each vertex
tetrahedron
500
A 180 rotation does the same transformation as what?
A reflection across the origin
500
This formula will help you find the interior measures of any polygon
180(n-2)