Vocabulary 1
An angle that measures less than 90 degrees.
acute angle
A triangle with an obtuse angle.
Obtuse triangle
2 triangles that have equal sides and equal angles.
congruent
To rotate the shape around a fixed point.
turn
Scalene triangles have how many sides that are equal?
0
The angle formed when 2 perpendicular lines cross and perfectly square or 90 degrees.
right angle
A triangle made up of 3 acute angles.
acute triangle
Moving a shape without turning or flipping it.
slide
All triangles have how many sides?
3
what triangles have 2 sides that are equal?
Isoceles
An angle that measures more than 90 degrees.
obtuse angle
A triangle with a right angle.
right triangle
2 triangles that have different sides but equal angles.
similar
All triangles have 3?
angles and vertices
When dilation occurs, the shape stays the same, but what changes ______.
size
A shape with 3 sides, 3 angles, and 3 vertices.
triangle
Triangle with 2 equal sides and 2 equal angles.
Isosceles triangle
To turn something so it is the mirror image of itself.
flip
You can catergorized triangles based on their?
sides and angles
Similar triangles are the same shape, but different sizes.
true
Triangle with 3 equal sides and 3 equal angles.
equilateral triangle
Triangle with no equal sides and no equal angles.
scalene triangle
Changing the size of a shape (larger or smaller), but keeping the shape the same.
dilation
Equilateral triangles have 3 equal ?
sides
Similar triangles are the same shape but _____ sizes.
different