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.