Quadrilaterals
4 equal sides
4 right angles
What is a square?
An angle that measures 90 degrees.
What is a right angle?
Extends in the opposite directions forever.
What is a line?
A shape that has three sides and three angles.
What is a triangle?
2 sides are parallel but are not equal.
What is a trapezoid?
An angle that measures between 90 and 180 degrees.
What is an obtuse angle?
Part of a line with two endpoints.
What is a segment?
A triangle with 3 congruent (same length) sides.
What is an equilateral triangle?
4 equal opposite parallel sides.
What is a Rhombus?
An angle that measures less than 90 degrees.
What is an acute angle?
Has one endpoint and extends forever in one direction.
What is a ray?
True or False:
If you are given two angles of a triangle you can't find the third angle.
False:
Add up the two angles and then subtract them from 180 degrees.
4 sided shape with 4 right angles.
What is a quadrilateral or a rectangle?
Angles that are made by intersecting lines and measure the amount.
What are opposite angles?
Lines that go on in each direction but NEVER cross.
What is parallel lines?
True or False:
Triangles can have right, obtuse and acute angles.
True
2 pair of equal sides
4 right angles
What is a rectangle?
An angle that measures between 181 and 359 degrees.
What is a reflex angle?
Lines that cross and form 90 degree angles.
What are perpendicular lines?
A triangle with no congruent (same length) sides.
What is a scalene triangle?
2 pairs of adjacent equal sides.
Opposite sides are not equal.
What is a kite?
Two angles that are next to each other.
What is an adjacent angle?
Lines that cross and don't always form 90 degree angles.
What are intersecting lines?
A triangles with at least TWO congruent (same length) sides.
What is an isosceles triangle?