Acute Obtuse Right Triangle

Name this triangle.

• acute triangle

• right triangle

• straight triangle

• obtuse triangle

• acute
• obtuse
• right

An angle that measures less than 90°

• Acute

• Obtuse

• Right

• Straight

This is what kind of angle?

• right

• acute

• obtuse

• straight

Which triangle has all three of its angles measuring less than 90°?

• Acute

• Right

• Obtuse

• Equilateral

What Type of Triangle is this?

• right triangle

• acute triangle

• obtuse triangle

Imagine you're an explorer trekking through the Geometry Jungle and you stumble upon a mysterious triangle. One of its angles is larger than 90 degrees! What type of triangle have you discovered?

• Acute

• Right

• Obtuse

• Equilateral

How many acute angles must an acute triangle have?

• 2

• 1

• 4

• 3

I know this is an acute triangle because

• there is a 90° angle

• all of the angles are less than 90 degrees

• there is an angle greater than 90° but less than 180°

An acute triangle has ​ (a)   acute angles in it.

• three

• two

• one

• zero