Triangles & Symmetry Period 4

Look at the sides of this triangle. What type of triangle is this?

• scalene
• acute
• equilateral
• isosceles

Look at the sides of this triangle. What type of triangle is this?

• Equilateral
• Isosceles
• Scalene
• Obtuse

What type of triangle is shown?

• Isosceles

• Right-angled

• Equilateral

• Scalene

What kind of triangle is this? Name it for its angles.

• acute

• obtuse

• right

In an ______________ triangle, all three angles are less than 90 degrees.

• acute

• right

• obtuse

• 360 degrees

In a ____________ triangle one angle is exactly 90 degrees.

• acute

• right

• obtuse

• 360 degrees

In an ___________ triangle one angle is greater than 90 degrees.

• acute

• right

• obtuse

• 360 degrees

Symmetry is ...

• -when one shape is exactly opposite of another shape 
• -when one shape becomes exactly like another if you flip it
• -when one shape becomes exactly like another if you slide it
• reflectional symmetry

How many lines of symmetry does this shape have?

• 0

• 2

• 1

• 4

How many lines of symmetry does this shape have?

• 1

• 2

• 3

• 4