Fun with Angles and Polygons. A unit for learning about geometry Ms. Collette Robitaille. Introduction to Geometry. Unit 1: Angles (2 days) Unit 2: Triangles (2 days) Unit 3: Quadrilaterals (2 days) Geometry Webquest (5 days) Review Activities (3 days) Test (1 day)
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A unit for learning about geometry
Ms. Collette Robitaille
*This is a 3 week unit of instruction.
Can you name the following angles?
Click on the angle to reveal its name.
An acute angle is greater than 90º.
Remember an acute angle is a cute little angle.
An acute angle is less than 90º.
An obtuse angle is greater than
90º but less than 180º.
Better check again. Obtuse angles are almost right and not quite straight.
An obtuse angle is between 90ºand 180º.
Question # 3
A straight angle measures 180º.
Remember. A straight angle looks like a straight line.
A straight angle measures 180º and looks like a straight line.
A right angle does not measure
A right angle looks like the corner of a piece of paper.
A right angle does measure exactly 90º.
Can you identify theses triangles by their angles?
Click on the angle to check your answer.
Can you identify these triangles by their sides?
Click on the triangle to check your answer.
Can you identify the following quadrilaterals?
Click on the quadrilateral to check your answer.
A rectangle is a four sided figure with 4
Think about it. A rectangle looks like a long box.
You remembered that a rectangle
has 2 parallel sides, 4 right
angles, and opposite sides are
A rhombus has four congruent sides.
Remember that a rhombus looks like a kite or a diamond.
You remembered that a rhombus
looks like an italic square and all 4
sides are congruent.
A square is a quadrilateral with only two right
A square has all sides congruent and all angles congruent.
You knew that a square has four
equal sides and four equal angles.
A trapezoid is a four sided figure with one set
of parallel sides.
Think of the tables in a classroom. It looks like a triangle without the top.
A trapezoid has exactly one set of
A parallelogram has two sides that are
parallel and opposite angles are congruent.
Remember that a parallelogram looks like an italic rectangle.
A parallelogram is a 4 sided figure
with opposite sides parallel and
opposite angles congruent.
Web Quest #1
Web Quest #2