Introduction to Triangles

What is an "Acute" Angle?

• Angle that measures 180
• An Angle that measures 90
• An angle that measures more than 90
• An angle that measures less than 90

Tags

TEKS.MATH.4.7D

An angle whose measure is exactly 90 degrees.

• acute
• vertical
• right
• straight

Tags

CCSS.4.G.A.1

Classify by side.

• Isosceles
• Scalene
• Equilateral

Tags

CCSS.4.G.A.2

Classify by angle

• Equilateral
• Right
• Acute
• Obtuse

Tags

CCSS.4.G.A.2

Name this triangle

• Acute, Scalene
• Obtuse, Scalene
• Right, Isosceles
• Acute, Equilateral

Tags

TEKS.MATH.4.6C

Which type of triangle is pictured?

• Equilateral Triangle
• Right Isosceles Triangle
• Obtuse Scalene Triangle
• Obtuse Equilateral Triangle

Tags

CCSS.4.G.A.2

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°
• 90°
• 180°
• 360°

Tags

CCSS.8.G.A.5

Find the measure of each angle indicated. 

• 139°
• 66°
• 138°
• 116°

Tags

CCSS.8.G.A.5

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

Tags

CCSS.8.G.A.5

Find the measure of each angle indicated. 

• 139°
• 66°
• 138°
• 116°

Tags

CCSS.8.G.A.5