2-D Shapes - Triangles

These shapes have width and height but no thickness.

• One-dimensional shapes

• Two-dimensional shapes

• Three-dimensional shapes

What type of triangle is this?

• Obtuse
• acute
• straight
• right

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

What type of triangle is this?

• Equilateral

• Acute

• Right

• Obtuse

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

What kind of triangle is this?

• Obtuse because it has 1 obtuse angle
• Right because it has 2 right angles
• Right because it has 1 right angle
• Acute because it has 2 acute angles

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

What is a triangle?

• A polygon with 3 sides.
• A polygon with 8 sides.
• Not a polygon.
• Has 4 sides.

This is what is called a characteristic of a shape.

• attribute
• color
• shape
• size

In a___________all the sides are the same length.

• equilateral triangle
• right triangle
• obtuse triangle
• scalene triangle

An________has two sides of the same length.

• isosceles triangle
• right triangle
• acute triangle
• obtuse triangle

In a_______NO sides are the same.

• right triangle
• acute triangle
• scalene triangle
• obtuse triangle

This triangle has one right side.

• left triangle
• right triangle
• scalene triangle
• acute triangle