Vocabulary
Sides
Angles
Lines
Triangles
100

A triangle with three acute angles

Acute Triangle

100

How many sides does this shape have?

0 sides

100

Classify this angle

This angle is acute.

100

Give a real world example of parallel lines.

Example: roads and sidewalks.

100

What type of triangle is this?

Right triangle

200

How many lines of symmetry does a triangle have?

3

200

How many equal sides does this shape have? Name the shape

2 equal sides. It is a trapezoid 

200


Classify this angle.

This angle is obtuse. 

200

What type of lines are shown in this image? 

Perpendicular lines.

200

What type of triangle is this?

This is an obtuse triangle.

300

Lines that cross each other at exactly one point.

Intersecting Lines

300

How many sides does this shape have? 

12 sides

300

Classify this angle. 

This is a right angle.

300

What is the difference between perpendicular lines and intersecting lines? 

Intersecting lines are the two lines in which they intersect each other at ANY angle, whereas the perpendicular lines are the two lines, in which they intersect at an angle of 90 degrees.

300

Is this triangle an equilateral, isosceles, or scalene?

Why?

This is a scalene triangle because it has no sides of equal length. 
400

Lines in the same plane that never intersect and are always the same distance apart.

Parallel lines 

400

 

How many pairs of parallel sides does this shape have?

2 pairs of parallel sides

400

Identify the angle <BCA

<BCA is acute

400

How many sets of perpendicular lines are shown?

There are two sets of perpendicular lines shown. 

400


 

Identify the triangle as isosceles, scalene, or equilateral. Explain why. 

This is an equilateral triangle. All three sides are equal in length. 

500

A quadrilateral whose opposite sides are parallel and of equal length. 

Parallelogram 

500

What is the difference between sides and vertices? 

Sides are lines. 

Vertices are the points where the sides meet. 

*We say vertex when there's just one*

500

Identify the angle <XHZ

The angle <XHZ is a right angle. 

500

A piano keyboard has a total of 88 keys. What best describes the relationship the black keys have with each other? 

The black keys are parallel to each other. 

500

Define the following: 

Equilateral triangle

Isosceles triangle

Scalene Triangle

Equilateral: has three sides of equal length.

Isosceles: has at least two sides of equal length.

Scalene: had no sides of equal length.