Understanding Triangle Angles

The video tutorial explains how to find missing interior angles in different types of triangles: scalene, right, and isosceles. It highlights that the sum of interior angles in any triangle is always 180 degrees. The tutorial provides step-by-step methods to calculate the missing angles using equations, demonstrating the process with examples for each triangle type.

Which type of triangle has all sides of different lengths?

• Equilateral

• Isosceles

• Right

• Scalene

Tags

CCSS.4.G.A.2

Which type of triangle has two sides of equal length?

• Right

• Scalene

• Isosceles

• Equilateral

Tags

CCSS.8.G.A.5

What is the sum of the interior angles of any triangle?

• 360 degrees

• 270 degrees

• 180 degrees

• 90 degrees

Tags

CCSS.8.G.A.5

In a scalene triangle, if two angles are 43 and 64 degrees, what is the measure of the third angle?

• 73 degrees

• 53 degrees

• 83 degrees

• 93 degrees

Tags

CCSS.8.G.A.5

If the sum of two angles in a triangle is 107 degrees, what is the measure of the third angle?

• 53 degrees

• 63 degrees

• 73 degrees

• 83 degrees

In a right triangle, what is the sum of the two acute angles?

• 45 degrees

• 180 degrees

• 135 degrees

• 90 degrees

Tags

CCSS.8.G.A.5

If one acute angle in a right triangle is 53 degrees, what is the measure of the other acute angle?

• 37 degrees

• 67 degrees

• 47 degrees

• 57 degrees

In a right triangle, if one angle is 90 degrees, what is the sum of the other two angles?

• 270 degrees

• 90 degrees

• 360 degrees

• 180 degrees

Tags

CCSS.8.G.A.5

In an isosceles triangle, if the base angle is 72 degrees, what is the measure of the other base angle?

• 72 degrees

• 90 degrees

• 54 degrees

• 36 degrees

Tags

CCSS.8.G.A.5

What is the measure of the third angle in an isosceles triangle if the two equal angles are 72 degrees each?

• 72 degrees

• 54 degrees

• 90 degrees

• 36 degrees

Tags

CCSS.8.G.A.5