Vocabulary
Types of triangles
Quadrilaterals
Angles
Symmetry and More
100
This word means two lines that never intersect. Draw an example.
Parallel
100
What does "tri" mean?
3
100
What is a quadrilateral?
Any closed, four cornered shape.
100
This angle equals 90 degrees.
What is a right triangle?
100
Draw a shape with a line of symmetry.
Answers will vary.
200
This word means lines that intersect to form right angles. Draw an example.
Perpendicular
200
What type of triangle has 3 equal side lengths?
Equilateral.
200
Draw a trapezoid and explain its attributes.
One pair of parallel lines.
200
This angle equals 180 degrees
What is a straight angle.
200
Define line of symmetry.
The imaginary line where you could fold the image and have both halves match exactly.
300
What kind of triangle has 2 equal sides and a line of symmetry?
Isosceles.
300
What type of triangle has no equal side lengths (doesn't match)?
Scalene.
300
Draw a parallelogram and explain its attributes.
Two pairs of parallel sides. Acute and obtuse angles.
300
Explain how acute and obtuse angles are different?
Acute- less than 90 degrees. Obtuse- more than 90 degrees.
300
Mike drew a triangle with one right angle and sides that measured 4cm, 6 cm, and 8 cm. Classify the type of triangle Mike drew based on the side length and angle measure. How many lines of symmetry does it have?
He drew a right scalene triangle with 0 lines of symmetry.
400
What is symmetry? Draw an example.
A shape that is equal or the same on both sides of the line of symmetry.
400
What are the attributes of an isosceles triangle?
2 equal sides. Can be obtuse or acute. One line of symmetry.
400
Explain how a rectangle is a parallelogram.
A rectangle has 4 right angles and two pairs of parallel lines, but with 2 pairs of different side lengths.
400
Draw a straight angle figure with Q, R, S. Then draw the angle QRZ. If QRZ equals 45 degrees, what does angle SRT equal?
180-45=135 degrees
400
Rectangle ABCD has a line of symmetry from one corner cutting diagonally through. If the corner ABC has been cut symmetrically, what is the measurement of the two smaller angles?
Rectangle has 90 degree right angles. A line of symmetry would cut the angle in half, making each smaller angle 45 degrees.
500
Draw and define a rhombus.
A parallelogram with 4 equal sides, a pair of acute and a pair of obtuse angles.
500
Create a right scalene triangle (use grid paper or a ruler) Explain how your triangle is both right and scalene.
Right- 90 degrees. Scalene- no matching side lengths.
500
Mike drew a quadrilateral with four equal sides and no right angles. What type of quadrilateral did Mike draw? How many lines of symmetry does it have?
He drew a rhombus with 2 lines of symmetry.
500
Model how to use a protractor to find a missing angle.
Answers will vary.
500
How many lines of symmetry does a circle have? What point do all lines of symmetry for a given circle have in common?
A circle has an infinite amount of lines of symmetry. All lines of symmetry pass through the center point.
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