When classifying Triangles by their SIDES, what are the 3 types of triangles?
Scalene, Isosceles, and Equilateral
When classifying triangles by their ANGLES, what are the 3 types of triangles?
Acute triangle, Obtuse triangle, and Right triangle
I am a quadrilateral with 4 angles that are equal to 90 degrees. Which two shapes can I be?
Rectangle and Square
A quadrilateral with four congruent sides and four 90 degree angles. What am I?
Square
A triangle with sides that are:
45cm, 73cm, and 55cm
One angle is greater than 90 degrees
What type of triangle am I?
Obtuse Scalene
What is an isosceles triangle?
Triangle with at least 2 congruent sides.
What is an equilateral triangle?
A triangle with all 3 congruent sides
I am a quadrilateral with at least one set of parallel sides. What am I?
trapezoid
True or False: (explain why)
All parallelograms are quadrilaterals
True. Quadrilaterals have to have 4 sides, all parallelograms have 4 sides.
All squares are parallelograms
True.
Parallelograms only need 2 sets of parallel sides, squares will always have 2 sets of parallel sides.
What is a scalene triangle?
If a triangle has angles that are:
126o, 11o, and 43o
How can we classify it?
Obtuse triangle
True or False: (explain why)
All parallelograms are rhombuses
False. All rhombuses are parallelograms, but some parallelograms can be rhombuses.
True or False: (explain why)
All rectangles are squares
False.
Some rectangles CAN be squares, but not all. Rectangles don't have to have all 4 congruent sides.
A triangle with sides that are:
16cm, 16cm, and 16cm
What type of triangle am I?
Equilateral Triangle
A triangle has sides that are:
24cm, 84cm, and 20cm
What type of triangle is this? Why?
Scalene triangle because it has no congruent sides
Explain the difference between acute, obtuse, and right triangles.
Acute - all angles are less than 90 degrees
Obtuse - at least one angle is greater than 90 degrees
Right - at least one angle is EQUAL to 90 degrees
I am the quadrilateral that can have NO sets of parallel sides. What shape am I?
Kite
A quadrilateral with 4 congruent sides but no 90 degree angles. What am I?
Rhombus
A triangle with sides that are:
8cm, 17cm, and 15cm
One angle is 90 degrees
What type of triangle am I?
Right Scalene Triangle
Is this possible or impossible? Explain why.
A triangle with the angles:
148o, 11o, and 15o
Impossible, because the sum of all angles in a triangle have to equal 180o
A triangle has sides that are:
14in, 25in, 14in
The angles are all less than 90 degrees.
What type of triangle am I?
Acute Isosceles Triangle
Name all of the ways this shape can be classified
Quadrilateral, Trapezoid
What are all the ways this figure can be classified?
Quadrilateral, Parallelogram, Rhombus, Kite
(trapezoid is acceptable)
True or False: (explain why)
All quadrilaterals are parallelograms
False.
Quadrilaterals only have to have 4 sides. Parallelograms must have 2 sets of parallel sides. Some quadrilaterals can be parallelograms.