angles and shapes
TRANSCRIPT
FUN WITH ANGLES AND POLYGONS
INTRODUCTION TO GEOMETRY
Unit 1: Angles Unit 2: Triangles Unit 3: Quadrilaterals
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UNIT ONE: EXPLORING ANGLES
Can you name the following angles?
Click on the angle to reveal its name.
obtuse acute
right straight
ANGLE INFORMATION
Acute Angles – measure less than 90º
Right Angles – measure exactly 90º
Obtuse Angles – measure more than 90º but less than 180º
Straight Angles – measure exactly 180º
Can you think of a way to remember the names for each angle?
UNIT ONE: ANGLES QUICK CHECK
Question #1An acute angle is greater than 90º.
A. TrueB. False
UNIT ONE: ANGLES
OOPS!!!!!
Remember an acute angle is a cute little angle.
Try Again
UNIT ONE: ANGLES
Congratulations!!!!!
An acute angle is less than 90º.
UNIT ONE: ANGLES QUICK CHECK
Question #2An obtuse angle is greater than90º but less than 180º.
A. TrueB. False
UNIT ONE: ANGLES QUICK CHECK
OOPS!!!!!
Better check again. Obtuse angles are almost right and not quite straight.
Try Again
UNIT ONE: ANGLES QUICK CHECK
Congratulations!!!!
An obtuse angle is between 90ºand 180º.
UNIT ONE: ANGLES QUICK CHECK
Question # 3A straight angle measures 180º.
A. TrueB. False
UNIT ONE: ANGLES QUICK CHECK
OOPS!!!!!
Remember. A straight angle looks like a straight line.
Try Again
UNIT ONE: ANGLES QUICK CHECK
Congratulations!!!!
A straight angle measures 180º and looks like a straight line.
UNIT ONE: ANGLES QUICK CHECK
Question #4A right angle does not
measure90º.
A. TrueB. False
UNIT ONE: ANGLES QUICK CHECK
OOPS!!!!!
A right angle looks like the corner of a piece of paper.
Try Again
UNIT ONE: ANGLES QUICK CHECK
Congratulations!!!!
A right angle does measure exactly 90º.
UNIT TWO : TRIANGLES
Can you identify theses triangles by their angles?
Right acute obtuse
Click on the angle to check your answer.
UNIT TWO: TRIANGLES
Right Triangles - have exactly one right angle.
Acute Triangles – all angles are less than 90º.
Obtuse Triangles - have exactly one angle greater than 90º.
UNIT TWO: TRIANGLES
Can you identify these triangles by their sides?
isosceles scalene equilateral
Click on the triangle to check your answer.
UNIT TWO: TRIANGLES
Isosceles Triangles - two sides are of equal length
Scalene Triangles - no sides are equal in length
Equilateral Triangles - all sides are of equal length
TRIANGLES TASK
For this task, you and your partner, must complete the activity on the webpage listed below. Review the triangles and then click Triangles Quiz. Write your answers on a sheet of paper.
Triangles Review
UNIT THREE: QUADRILATERALS
Can you identify the following quadrilaterals?
parallelogram rectangle
square
rhombus trapezoid
Click on the quadrilateral to check your answer.
UNIT THREE: QUADRILATERALS
Parallelograms - 4-sided figure, opposite sides are parallel and congruent
Rectangle – 4 sided figure with 4 right angles and opposite side congruent
Square – 4 sided figure with 4 right angles and 4 congruent sides
Rhombus – 4 sided figure, all sides are congruent Trapezoid – 4 sided figure with one pair of parallel
lines
UNIT THREE: QUADRILATERALS QUICK CHECK
Question #1A rectangle is a four sided figure with 4congruent sides.
A. TrueB. False
UNIT THREE: QUADRILATERALS
OOPS!!!!!!!!
Think about it. A rectangle looks like a long box.
Try Again
UNIT THREE: QUADRILATERALS
Great!!!!!!!!!
You remembered that a rectanglehas 2 parallel sides, 4 rightangles, and opposite sides arecongruent.
UNIT THREE: QUADRILATERALS QUICK CHECK
Question #2A rhombus has four congruent sides.
A. TrueB. False
UNIT THREE: QUADRILATERALS
OOPS!!!!!!!!
Remember that a rhombus looks like a kite or a diamond.
Try Again
UNIT THREE: QUADRILATERALS
HOORAY!!!!!!
You remembered that a rhombuslooks like an italic square and all 4sides are congruent.
UNIT THREE: QUADRILATERALS QUICK CHECK
Question #3A square is a quadrilateral with only two rightangles.
A. TrueB. False
UNIT THREE: QUADRILATERALS
OOPS!!!!!!!!!
A square has all sides congruent and all angles congruent.
Try Again
UNIT THREE: QUADRILATERALS
Nice Job!!!!!!!
You knew that a square has fourequal sides and four equal angles.
UNIT THREE: QUADRILATERALS QUICK CHECK
Question #4A trapezoid is a four sided figure with one setof parallel sides.
A. TrueB. False
UNIT THREE: QUADRILATERALS
OOPS!!!!!!
Think of the tables in a classroom. It looks like a triangle without the top.
Try Again
UNIT THREE: QUADRILATERALS
AWESOME!!!!!!!
A trapezoid has exactly one set ofparallel sides.
UNIT THREE: QUADRILATERALS QUICK CHECK
Question #5A parallelogram has two sides that areparallel and opposite angles are congruent.
A. TrueB. False
UNIT THREE: QUADRILATERALS
OOPS!!!!!!
Remember that a parallelogram looks like an italic rectangle.
Try Again
UNIT THREE: QUADRILATERALS
Nice Work!!!!!
A parallelogram is a 4 sided figurewith opposite sides parallel andopposite angles congruent.