Triangles & Quadrilaterals

Which of the following shapes is a polygon?

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Which of these shapes is not a polygon?

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What is a polygon?

• A closed figure made up of straight line segments
• An open figure made up of straight line segments
• A closed figure made up of curved edges
• An closed figure made up of crossed line segments

What is the BEST name for the polygon?

• parallelogram

• trapezoid

• rhombus

• rectangle

• Equilateral Triangle
• Scalene Triangle
• Isosceles Triangle
• Right Triangle

What properties are there in a Scalene triangle?

• 1 right angle

• 3 equal sides, 3 equal angles, 3 lines of symmetry

• 0 equal sides, 0 equal angles, 0 lines of symmetry

• 2 equal sides, 2 equal angles, 1 lines of symmetry

Classify this triangle by its angles

• Acute

• Obtuse

• Equilangular

• Right

Classify this triangle by sides and angles (choose two answers).

• Acute triangle

• Obtuse triangle

• Equilateral triangle

• Isosceles triangle

• Scalene triangle

Classify the triangle by sides and angles (choose two answers).

• Acute triangle

• Obtuse triangle

• Equilateral triangle

• Isosceles triangle

• Scalene triangle

What shape is this?

• Rectangle
• Square
• Rhombus
• Trapezoid