Mastering Triangle Types and Missing Angles

This video tutorial covers the classification of triangles based on their sides and angles. It explains the characteristics of scalene, isosceles, and equilateral triangles, as well as acute, right, and obtuse triangles. The video also demonstrates how to solve for missing angles in triangles using equations and provides examples of more complex problems involving multiple variables. Finally, it discusses how to name triangles based on their sides and angles.

Which type of triangle has all sides of different lengths?

• Equilateral

• Scalene

• Isosceles

• Right

Tags

CCSS.4.G.A.2

What is the name of a triangle with two sides of equal length?

• Scalene

• Isosceles

• Equilateral

• Obtuse

Tags

CCSS.4.G.A.2

A triangle with all angles less than 90 degrees is called?

• Right triangle

• Obtuse triangle

• Acute triangle

• Scalene triangle

Tags

CCSS.4.G.A.2

What is the largest angle in a right triangle?

• 45 degrees

• 120 degrees

• 60 degrees

• 90 degrees

Tags

CCSS.7.G.B.5

If one angle of a triangle is 90 degrees, what type of triangle is it?

• Acute triangle

• Equilateral triangle

• Right triangle

• Obtuse triangle

Tags

CCSS.4.G.A.2

What is the sum of all angles in any triangle?

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

Tags

CCSS.8.G.A.5

In a triangle, if two angles are 45 degrees and 45 degrees, what is the measure of the third angle?

• 90 degrees

• 120 degrees

• 45 degrees

• 60 degrees

Tags

CCSS.8.G.A.5

If a triangle has angles 2x, 2x, and x, what is the value of x?

• 45 degrees

• 36 degrees

• 60 degrees

• 30 degrees

Tags

CCSS.8.G.A.5

In a triangle with angles 7x, 3x, and 90 degrees, what is the value of x?

• 11 degrees

• 5 degrees

• 9 degrees

• 7 degrees

Tags

CCSS.8.G.A.5

What is the name of a triangle with two equal sides and a 90-degree angle?

• Obtuse isosceles

• Right scalene

• Acute isosceles

• Right isosceles

Tags

CCSS.4.G.A.2