Triangle Angle Properties and Relationships

The video tutorial covers the properties of triangles, focusing on two main properties: the sum of all angles in a triangle is 180 degrees, and the sum of any two sides of a triangle is always greater than the third side. Examples are provided to illustrate these properties, including calculations for equilateral and other types of triangles. The tutorial concludes with important points about different types of triangles, such as equilateral, right-angled, and obtuse-angled triangles.

What is the sum of all angles in any triangle?

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

What is the sum of angles in a triangle?

• 360 degrees

• 180 degrees

• 90 degrees

• 270 degrees

In an equilateral triangle, what is the measure of each angle?

• 90 degrees

• 120 degrees

• 60 degrees

• 45 degrees

How do you calculate the measure of each angle in an equilateral triangle?

• Divide 360 by 2

• Divide 360 by 3

• Divide 180 by 3

• Divide 180 by 2

If angle A is 39 degrees and angle C is 48 degrees in triangle ABC, what is the measure of angle B?

• 91 degrees

• 90 degrees

• 92 degrees

• 93 degrees

If two angles of a triangle are 39 degrees and 48 degrees, what is the third angle?

• 90 degrees

• 91 degrees

• 92 degrees

• 93 degrees

What does the side-sum property of triangles state?

• The sum of any two sides is less than the third side

• The sum of any two sides is greater than the third side

• The sum of any two sides is twice the third side

• The sum of any two sides is equal to the third side

What is the property of the sum of any two sides of a triangle?

• It is greater than the third side

• It is less than the third side

• It is equal to the third side

• It is twice the third side

Can a triangle be formed with sides measuring 3 cm, 4 cm, and 8 cm?

• Only if it's an isosceles triangle

• Only if it's a right triangle

• No

• Yes

Can a triangle be formed with sides 3 cm, 4 cm, and 8 cm?

• Yes

• No

• Only if it's a right triangle

• Only if it's an isosceles triangle