Basic Shapes
Types of Triangles
Identifying Angles
Exploring Triangles
Fun with Geometry
100

A shape with three straight sides and three angles

A triangle 

100

A triangle where all sides are the same length

An equilateral triangle

100

An angle smaller than a right angle

an acute angle

100

The name for the longest side of a right-angled triangle

the hypotenuse

100

The shape of a piece of pizza when sliced

A triangle 

200

The number of sides a triangle has

Three

200

A triangle with two sides that are the same length

An isosceles triangle

200

An angle that is exactly 90 degrees

A right angle 

200

A triangle with angles of 60 degrees each.

an equilateral triangle

200

 A computer button often shaped like a right triangle, used to symbolize 'forward' in music or videos

the play button

300

A simple shape formed by straight lines with corners or points

A polygon or angle 

300

A triangle where all sides have different lengths

scalene triangle

300

A tool used to measure angles

A protractor

300

If a triangle has angles measuring 90, 45, and 45 degrees, it is called this

isosceles right triangle

300

A balancing game kids might play that involves standing on one foot, named after a large extinct bird

A flamingo 

400

The shape formed when two lines meet at a point

An angle 

400

The total amount of angles in any triangle.

Three

400

An angle larger than a right angle but less than a straight line.

an obtuse angle

400

The closed area inside a triangle

interior or area of a triangle

400

The instrument with a triangular shape that makes a tinkling sound when struck

a triangle

500

A shape that is flat and closed with three or more sides

A polygon 

500

A triangle with one right angle.

A right triangle

500

Two lines that form a 'T' shape by meeting at a right angle

perpendicular lines

500

A triangle with a high vertical point and two equal sides meeting at this point

isosceles triangle

500

The name of the three-sided figure that is often seen in puzzles or games suggesting caution or as the simplest board game layout

a triangle

M
e
n
u