Finding Missing Angles in Triangles

The video tutorial covers the concept of triangles, explaining their properties and how to find missing angles. It includes examples of different types of triangles: isosceles, equilateral, and right triangles. Each example demonstrates step-by-step calculations to find unknown angles using the sum of angles in a triangle, which is 180 degrees.

What is a polygon with three sides and three vertices called?

• Hexagon

• Triangle

• Square

• Pentagon

Tags

CCSS.2.G.A.1

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

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

Tags

CCSS.8.G.A.5

If a triangle has angles of 68 degrees and 48 degrees, what is the measure of the third angle?

• 64 degrees

• 62 degrees

• 60 degrees

• 58 degrees

Tags

CCSS.8.G.A.5

In an isosceles triangle, if one angle is 65 degrees, what is the measure of each of the other two angles?

• 55 degrees

• 65 degrees

• 50 degrees

• 60 degrees

Tags

CCSS.8.G.A.5

In an isosceles triangle, if the base angles are each 65 degrees, what is the measure of the vertex angle?

• 50 degrees

• 70 degrees

• 80 degrees

• 60 degrees

Tags

CCSS.8.G.A.5

What is the measure of each angle in an equilateral triangle?

• 75 degrees

• 45 degrees

• 90 degrees

• 60 degrees

Tags

CCSS.8.G.A.5

What type of triangle has all three sides of equal length?

• Scalene

• Equilateral

• Right

• Isosceles

Tags

CCSS.4.G.A.2

What is the measure of each angle in an equilateral triangle?

• 90 degrees

• 75 degrees

• 60 degrees

• 45 degrees

Tags

CCSS.8.G.A.5

If an isosceles triangle has one angle of 82 degrees, what is the measure of each of the other two angles?

• 49 degrees

• 50 degrees

• 51 degrees

• 52 degrees

Tags

CCSS.8.G.A.5

In a right triangle, if one angle is 18 degrees, what is the measure of the other non-right angle?

• 92 degrees

• 62 degrees

• 72 degrees

• 82 degrees

Tags

CCSS.7.G.B.5