Triangles

How do you know this is an obtuse triangle?

How do you know this is an acute triangle?

Name the triangle in as many ways as possible. By sides and angles.

• Obtuse

• Right

• Acute

• Isosceles

• Equilateral

Name that shape.

• quadrilateral, rectangle
• quadrilateral, rectangle, square
• quadrilateral, parallelogram, rectangle
• quadrilateral, parallelogram, rectangle, square

Based on the angles only.

• acute

• obtuse

• right

The angles in this Dorito can best be described as...

• Obtuse

• Right

• Acute

What kind of triangle is this?

• Acute
• Super
• Right
• Obtuse

A triangle that has angles measuring 90 degrees, 45 degrees, and 45 degrees with two congruent (equal) sides is called a______________.

• Scalene Acute

• Isosceles Right

• Scalene Right

• Equilateral Acute

Classify the following triangle

• Isosceles triangle

• Equilateral triangle

• Scalene triangle

Classify this triangle by its angles

• Acute

• Right

• Obtuse