Triangles

How do you know this is an obtuse triangle?

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OFF

How do you know this is an acute triangle?

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OFF

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