Triangles
This triangle has two acute angles and one obtuse angle.
What is an obtuse triangle?
A line with two endpoints.
What is a line segment?
This shape has four right angles, four equal sides, four sets of perpendicular lines and 2 sets of parallel sides.
What is a square?
This angle measures exactly 180 degrees.
What is a straight angle?
Divides a figure so that one half of the figure matches the other half.
What is a line of symmetry?
This triangle has three acute angles.
What is an acute triangle?
This figure has one endpoint and another end that continues without end in the other direction.
What is a ray?
This shape has two obtuse angles, two acute angles, 2 sets of parallel sides and 4 equal sides.
What is a rhombus?
This angle measures less than 90 degrees.
What is an acute angle?
A square has ____ lines of symmetry.
What are four lines of symmetry?
This triangle has two acute angles and one right angle.
What is a right triangle?
Lines that intersect at a common point.
What are intersecting lines?
This shape has four right angles, two sets of equal sides, two sets of parallel sides, and four sets of perpendicular lines.
What is a rectangle?
This angle measures exactly 90 degrees.
What is a right angle?
A regular trapezoid has ____ lines of symmetry.
What is one line of symmetry?
This triangle has sides that are all the same length.
What is an equilateral triangle?
Lines that never cross and are always the same distance apart.
What are parallel lines?
This shape has one pair of parallel sides, two obtuse angles and two acute angles.
What is a trapezoid?
This angle measures more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
The capital letter I has _____ lines of symmetry.
What are two lines of symmetry?
This triangle has no sides of equal length.
What is a scalene triangle?
Lines that cross and always make 90 degree angles.
What are perpendicular lines?
This shape has one right angle, one set of perpendicular lines and three sides.
What is a right triangle?
A right triangle has these angles in it.
What are acute and right angles?
An equilateral triangle has _____ lines of symmetry.
What is three lines of symmetry?